diff --git a/data/klebsiella_PE1.fq b/data/klebsiella_PE1.fq
new file mode 100644
index 0000000000000000000000000000000000000000..96690349ffd63d67f61f327d0c2fbaa13fb3f929
--- /dev/null
+++ b/data/klebsiella_PE1.fq
@@ -0,0 +1,40 @@
+@SRR1222430.1 1 length=251
+GCCCGCGAAGCGGAGCTGGCCGCCTGCAAAGGCCGTTCGCGCTCGCTGTCGCTGGATCTGTACGCCCAGTGGCGCTGCATGGAGGACAACCACGGCAAGTGGCGCTTCACCTCGCCGACCCATACCGTGCTGGCCTTCGCCCAGGCGCTGAAAGAGCTGGCGCAGGAGGGCGGCGTCAGCGCTCGCCATCAGCGCTACCGCAACAATCAGCGCCGTCTGGTGGCAGGGATGCGCGCGCTCGGCTTCCGGCC
++SRR1222430.1 1 length=251
+CCCCCCCCCBBCGGCGGGGG@GGGGGHHHGHBHH@GGHGGGGGGGGG@GHGHGGGHHHHHHHHHGGGGGHHHFCGGGGHHHGHHGGHHHHGGGGCCGGGGHFFGGGGGHHHHHGGGGGGCGHHHHGGGGGGGGGGGGGGGGGGAEGGFFFFFFFFFFFFFFAFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEDFFFFFFFFFFF:DA;CCFFBBFDAFFFAFFFFFFFFA-9A>DFFFFFBFFB
+@SRR1222430.2 2 length=250
+AGAAATTCGCCATCAGAATAAAAACCTCATATGCACATTTTCTTGTTATTGCACAGCCTGTGCCACTTTAGCGCCAGCCTCTCCGGCAATCGTGGAGAAATTAAGGAGATAGTGTAATTTATCATGTTGCTTTTGCCGTATCGTAAAGAAACCTCGAGCTTTCCTGCCAGCAGGTAGCGAGTCTGCTTCGTCACCGCAGACCGGCGCATTATCCCTTGCCGGTGTGAAACCTCATTTCATTTAAGTCAAA
++SRR1222430.2 2 length=250
+BBBBBFFFBBBBFGGGGGGGGGHHGGHHHHHHHHGFGHHHHHHHHGHHHFFFHHFHHHHHHEHGFHHHFGFGFGGGEGGFH@@HGCGGGHHGHHGGHFAFHHHEGFHHGGHHFHFHHHHHEHHHHHHHHHHHGHHHGGGGHHGHFGGFDGFGFHGEGFCDHGGHHHHHHHGHHEHHGHGGGGHGFHHEHGHGGGGDFGGGHHGADA?DBGGGGGGFFFFBBFFFFFFFFFFFFFFFFFBFFFFFFFFF/B
+@SRR1222430.3 3 length=236
+CAAACACCTGACGCGGTTCCAGCAGGTACTCCTGCACGCCAATTTCCGGGCGGGCAGTAAAGCGCTGTTTGCAGCCCGTCTGGTGCAGGCGCCCCAGATAGCGGCCAACCCATTCCATCTGATCAAGGTTATCCGCTTCGAACTGACGACCGCCAAGGCTTGGGAAAACGGCAAAGTAGAATCCCTGATGCTGATGAAGCGTGCTGTCATTAAATAAGAGCGGCGCAGCAACGGGC
++SRR1222430.3 3 length=236
+CCCCCFFCFFFFGGGGGGGGGGHHHHHFGHHHHHHHHGGGGGHHHHHGGGGGGGGGGHHHHHHGGGGGHHHHHHHHGGGGHGHGHHGGHGGGGGGGGHHHHHGGGGGHGGGGHHHHGHHHHHHHHHHHHHHHHHGGGGGGGGGGGGGGGGGGGFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBFFFFFFFFFFFFFFFABF
+@SRR1222430.4 4 length=249
+GATCGGAAGAGCACACGTCTGAACTCCAGTCACCTTGTAATCTCGTATGCCGTCTTCTGCTTGAAAAAAAACCATGGCTCGGCGCCCAGGGCATCGTCCCGCAATCCGATGACTGGATGGTCGTCGCCAAAGGCACGATCAACGTCCAGCCTGCGGTGGTGATTGCCATCACTGGCACCTTCCAGGGCGGCAGTATTGGCGAAGTGTCCGGCCTCAAAATTGCCGCCGCCATGGTGCTGGCGGCGGATG
++SRR1222430.4 4 length=249
+1AAA1AAA1F>1BGEFG0ACFGBCGHEHCAFGFDA1GAEG2FGFAFFCEFGCA/GFD211DGF01FBGA>////B1000B@>///>E/?/?//F0E//?///>BC10<?B/?12?/??1/11>//<AA.AF0<.<<..C..</...../::G.:--;;.99B000099CF090;/9/09F09/90/9--9-9-B///9/9-;@--/;//-----9/9:FF/9//--9;>---/9/99;//9----9---
+@SRR1222430.5 5 length=208
+CGCTTATGGAAATGTGACGATCGTCACCGTTCCGCCCCGGGAGAACGGGGCGGAAAAAGAGGGCGATTTTAGTGCCAGCAGAAGTGATGAACCACCTGGCTAATCAGCTCCCGGGTCGGCTTGATAAAGCGCGTCTCCAGATACTCGTCAGGCTGATGGGCCTGATTGATGGAGCCCGGGCCGAGAACCAGCGTCGGACACAGCGTCT
++SRR1222430.5 5 length=208
+CCDDCCFFFFFFGGGGGGGGGGGHHHGHGHGHHGGGGGGGGGGGHHGGGGGGGGGGHHGGHHGGGGGHGHHHHHHHHHGHHHHHHHHHHHHHHHGGHHHHHHHHHHHHHHHGGGGGGGGGGGGHHHHHHHGGGGGGGGGGGGGGGGGGGGGGGGGGFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+@SRR1222430.6 6 length=192
+GAGAAACATCCTGCCAAGCCAAACTTTAAAGCGCCGAGGGATAATGGCGATGGTACCTACATGGTGGAGTTTGAATTCGATGGCCGTCATTACGCCTGGTCTGGTGCCGCCGGTAATCGGGTAGAGGCAATGCAATCTGCCTGGAGTGCCTACTTCAAGTGACAAAAAGGCCACAGGTTATCGCCTGTGGCC
++SRR1222430.6 6 length=192
+BBBBBFFFFFFFGGGGGGCGGGHHFHHHHFHHGGGGGGGGGHHGHFHGGEEGGFHGHGHHHHHHEGGHHHHHHHHHHHGHGHGHHGGGGGHHHGGEHHHHHFHHHHHHGGGGGCGGHHGGCGFGFFHGGHFHHHGHFHHHHHHHHGFFHFGHHHHHHHHHHHHHHHHHGDHHHGEHHHHHGGGGGGGGGGGG
+@SRR1222430.7 7 length=251
+CGCAGCCGGTAGTGGTTTTCGGGAGAGGACAATTTTTTGATATCCGAGATAGGTGAAGCTTTATCATCCATCTTCTCCAGCCTGGATTTAATGCGGCTCTTATACCGAGTATCGATTTTAGAAAATTGCTTATCTTCCGTTTTTGACCAGACAATTTTCATCCGTACCTCCACTGTACGCCCACACAAAATATAAGGAAATAATAAGACTATTAGATAAATTCCGAATTTCTTATGGGGTACTGTAGAGCG
++SRR1222430.7 7 length=251
+BBBBBDBBBDBBGGGGGGGGGGGGGGGGHHHHHHHHHGGGHHHHHGGGGGHHHHHHGHHHHHHHHHHHHHHHHHHHHGHHHGHHHHHGHHHHGHGGGGGHHHHHGHGGFFHHHGHHHGHHHHHHHHHHHHHHHHHHGHGHHHGGGGHHHHHGGHHHGHHHHHHGGHGGHHHHHHHHGHHGGGGFGGGGFHGGGGGGGGGGGGGGGGGGEFGGGGGGFGGGGGGGGGGGG/BFFFFFBFDDDFFFFFFFF/@
+@SRR1222430.8 8 length=250
+CGCGCGGGTAATTTTCAGCTGTGTCCCCGGACCGGCGACAAACCCCATGCAGTTAATCACGGTGGTGAATCCACGAAACTGATCGGCCAGCGTCTCCATGGCGCTACCGGCGATGTCGACGGCGAGGAAGGTGGCTCCGGCGTCGGCCAGCGCCTGATGGTTTGCCGACCGCAGCTGGCCGGCTTCATCCCAGGCCGCCGGCGAGACGATGACCGAGACCGTGCCCTGGCGCTCGATTACCGCAGGCACC
++SRR1222430.8 8 length=250
+AAABBBBB>ACFGGGGGDGGGGHHGGHHGGGGG0EGEGGGGHGGGGGHHHHHHFHHDHHHEDFGGEGHFHHHHHGGGGGHHHHHCGCFGHGGDFGHHHHHEHGGGFGHGCCGGGGCFHEGGGGG?CGGGGG;FEFGGGFFFFDFCCDD=AEFFFFFFFFFBFFFFFFFFB=DABCFFFFFFFFFFFFFFFFFF.EFFFFCFFFAAAFFFFF/BBB;9@DFCFF?AFFFEFAA9DF-9BDFFDFFAADFFF
+@SRR1222430.9 9 length=250
+CGGTGCGGCAACTGGAGACGCTGGCCGCGACCCGGGTCATGACGGACGGTAAAAGCGAAACGGTGCTGACCGGAAATCTGATTGTGGCGAAATTCAACCACGACACGAACCGTAACCAGGAACCTCAGATACACACCCATGCCGTCGTCATTAACGCCACGCAGAACGGGGACAAGTGGCAGTCTCTTGGCACTGATACAGTCGGGAAAACGGGCTTTATCGAGAATGTGTACGCGAACCAGATAGCCTT
++SRR1222430.9 9 length=250
+BCCBBBCDEDCDGGGGGGGGGGGGGHGGGGGGGGGGGGHHHHHGGGGGGGHGHHHHGGGGGGGEGGHHHHHGGGGGHHHHHGHHHHGHGGGGHHHHHHHGGGGGGGGGGGGGGHGGHHHGHHHGHHHHGGGGGGGGGGGGGGGGGGGGGGGGFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFHFFFHFFFFFDFFFFAFFFFFFFFFFFFFFFFBFFFFFFFFFFFFFFFFFFFFF
+@SRR1222430.10 10 length=251
+CGTCTCGCTGACCAGGGCGTTTTTCGCCTGATTGCGCGACATCACCAGCAGGTCGTTGATCATGCTGTCCAGCCGGTGCGCTTCGGTTTCGATACGCTCCAGCTCCTTGCTCTCTCCGCTGCGGCGACGCAGCAGGGCGGTACCCAATTGCAGGCGCGTAAGCGGCGTGCGCAGCTCGTGCGAGATATCGGACAGCAGCCGCTGCTGGCTGGTCATCATCCGCTCCAGGGCCGTCACCATCTGGTTAAAAC
++SRR1222430.10 10 length=251
+BBBBBFFBBBBFGGGGGGGEFGGGHGGGGHHHHHHGGGGGGGHGHHHHHHHH1FEEGHHEHHHHHHHHHHHHGGGGGGGGGGGGGGGGGHGGGHGGGGGGHHHHHHHHHHGHHHHHHGGGGGGGGGGGGGGGGFGEGGGGGGGGGGGFFFFFFFFFFFCFFFFFFFFBCFFFFFFFFDFFFADFFFFFFF;ABFFFFFFFFFFFFFFFFFFFBFFBFFFFFFFFFFFFF??DCFFFDFBFFBFFFFFBFF/
diff --git a/data/klebsiella_PE2.fq b/data/klebsiella_PE2.fq
new file mode 100644
index 0000000000000000000000000000000000000000..c21376294dba6a4210cf76c7d60ce316ef617692
--- /dev/null
+++ b/data/klebsiella_PE2.fq
@@ -0,0 +1,40 @@
+@SRR1222430.1 1 length=250
+CGATGCTGCGCTGCATCAATAAGCTGGAAGAGATCACCAGCGGCGATCTGATTGTCGATGGTCTGAAGGTCAACGACCCGAAGGTGGACGAACGTCTGATTCGTCAGGAAGCCGGGATGGTTTTCCAGCAGTTTTATCTGTTCCCGCACCTCACGGCGCTGGAAAACGTGATGTTTGGCCCGCTGCGGGTACGCGGCGCCAGCAAGCAGGCGGCGAGTGCAGGCTATCGTCGAGCAGCGGCCGGAAGCCG
++SRR1222430.1 1 length=250
+CCCCCCFFFCCCGGGGGGGGGGHHHHHHHHGHHHHHHHHHHGGGGGGGGHHGHHHHGHGHGHHHHHHHHHFHHHGGGGGGGGGGBFFHHGGGGGGHHGGHHHGHGGGHHHHHHGGGGGGGFGHGHHHHHHHHHGHHHFHHHHHHDFGGGGHHHHHGGAGGGGGGGGGGGGGGGFGGGFFFFFFFFFFFA=@FDF-BFFFFFFFFFFFFFEDFBDFFF-:FFFFFF/BFFFEFFFFFFFFFFF;--:DEFF
+@SRR1222430.2 2 length=251
+AGAAATTCGCCAGGGTGATCAACGTCTCATCGTCGGCGAGGGTCAGCGCCTGCGCGGGACAGTTTTCCACACAGGCCGGCCCCGCCTCGCGGCCCTGGCATAGATCGCACTTGTGCGCGCTGGCTTTCACCAGGCCTGCGGCCTGCGGCGTCACCACCACCTGCATCACCCCGAACGGGCAGGCCACCATGCAGGATTTACAGCCAATGCATTTCTCCTGACGGACCTGAACGCTGTCGCCGGACTGGGCG
++SRR1222430.2 2 length=251
+>1>AAFFF@11AEGGFFCGGGGGFGHFH2FF1F00EEE/@AEE0FGGFGEGGHGGCGC?EEFHEFEEHDF1EECHEFE/@@/BCCCFGAC@CC@C.CEGFHFHGHFHCEC?FH;CC?CG@@?-AF.BB0BFGF?E./EF;@?;AFF@<-@@??BFF?F-:A?BF999BBBF@@?@@@F-;@B@FF-A-9FF/BFFE/F//B/BBEFBFFFFF/BFFFFFFFEB?-@=B-/BBF--:;/A-B>--;>?EFE9
+@SRR1222430.3 3 length=236
+GCCCGTTGCTGCGCCGCTCTTATTTAATGACAGCACGCTTCATCAGCATCAGGGATTCTACTTTGCCGTTTTCCCAAGCCTTGGCGGTCGTCAGTTCGAAGCGGATAACCTTGATCAGATGGAATGGGTTGGCCGCTATCTGGGGCGCCTGCACCAGACGGGCTGCAAACAGCGCTTTACTGCCCGCCCGGAAATTGGCGTGCAGGAGTACCTGCTGGAACCGCGTCAGGTGTTTG
++SRR1222430.3 3 length=236
+?BBABBFBBFFFGGGGGGGGGGHHHHHHHHHHFHHHGGGGGHHHHHHHGHHHHHGHGHHHHHHHGHFEGGHGHHHHHHGGHHHHHGGGEGGGHGHHHGHHGGCGGGDHHHHHHHHGHHGHGHHHHHHFHGGGHFGGGGGHHHHEFGGCFGHHHHGGFGGGGGGGGGGGGGGGGGFFFEFFFFFFFBFFFFF=;ABFF/FA:DB;BF.9.BFFFFFFF/AFFFFFABDFFB/9BD.;
+@SRR1222430.4 4 length=250
+GCATGGAAAAGGGGTGTGGTGGGGAAAAGGGGAGATCCCTGCTGGAGCCCTACCCCTTAAAAAAAAAAACACAGCACCGGCTGCGTCGGGATACCGTAGCGTATCTCTACCGCCGCCATCACCCGCGCGCGTGCCATTTGGTCACCCAACAATGTGCCCATATGTCCTCCCACAGATGAGTACGTGATGCCAATCCTCATCGCAGAATAGCCTCTCAGTGGCCCCTTTGTAACCCACATACCCTACTTGG
++SRR1222430.4 4 length=250
+>>11111111111A100A0AAEA00A0A0//////011B11/1B10B0A/0B000/B0BB111/>/E////0?0/<0<////</<///////0??///.>-...0=1<=1D----::-::00/.----------;/:;;//-:/;/--9---;/9//////;/99/////-----9///;///----///9;9//-/9////-;--///////-//////;---9--/////:/----////;/--////
+@SRR1222430.5 5 length=208
+AGACGCTGTGTCCGACGCTGGTTCTCGGCCCGGGCTCCATCAATCAGGCCCATCAGCCTGACGAGTATCTGGAGACGCGCTTTATCAAGCCGACCCGGGAGCTGATTAGCCAGGTGGTTCATCACTTCTGCTGGCACTAAAATCGCCCTCTTTTTCCGCCCCGTTCTCCCGGGGCGGAACGGTGACGATCGTCACATTTCCATAAGCG
++SRR1222430.5 5 length=208
+DDDDDDCDDFFFGGGGGGGGGGHHHHGGGGGGGGGGHGHHHHHHHHHHHGGGHHHHHHHHHHGGGGHHHHHHHHHGGGGGGGGHHHHHHHGGGGGGGGGGGGHHHHHHHHHHHHGHGGGHHHHHHHHHHHHHHHGHHHHHHHHHGGGGGHHHHHHHHGGGGGGGGGGGGGGFGGFFFFFFFFDFFFFFFFFFFEFFFFFFFFFFFFFF
+@SRR1222430.6 6 length=192
+GGCCACAGGCGATAACCTGTGGCCTTTTTGTCACTTGAAGTAGGCACTCCAGGCAGATTGCATTGCCTCTACCCGATTACCGGCGGCACCAGACCAGGCGTAATGACGGCCATCGAATTCAAACTCCACCATGTAGGTACCATCGCCATTATCCCTCGGCGCTTTAAAGTTTGGCTTGGCAGGATGTTTCTC
++SRR1222430.6 6 length=192
+>3ABABF?ABBBGGGGEGGGFFHFFFHGHGGHFHHHHHHHHHFHHHHHHGGGHHHGGFFGFFDFHHHFGHHHHHGGGGGFGGFGG?EGGGHEFFEHHFHGDDFAGHFGGGFGFBEHHHHHHHBHHGHGEFHHFGFHGFGFHHFHAEGGGGFFHGHHHGGGGGGGGGGGGGGGGGGGGGGGGGGFFGGGGFB9
+@SRR1222430.7 7 length=251
+TGGCGGATTGAACGCCTGATCGCACATTTTCTGCAAGCCTCTGTCGCCCGGCAGAGGCCTTCCCGCGCCGCCTCGACGGGTTGCGTTTTGCCTCTTACCTGCGTTTTTTCTCCGCTCTACAGTACCCCATAAGAAATTCGGAATTTATCTAATAGTCTTATTATTTCCTTATATTTTGTGTGGGCGTACAGTGGAGGTACGGATGAAAATTGTCTGGTCAAAAACGGAAGATAAGCAATTTTCTAAAATCG
++SRR1222430.7 7 length=251
+BBCBBDBCCFFFGGGGGGGGGGGGGGHCFHHHHGHHHHGHHHHHHGHGGGGGGCECAEAGHHHHEGGFFFGGGGEGGFCCGFCADADCGHGHHHHHHHHHHGDDGFGGGGFHHDDGGHFGHFGHHHHEGHHGHHHGHHHGFGCFHHFGGFFFGGGGGGGGGGGGGFGGFGGGGGGGGGFBF?C.E=DFFDFFBFFE.AFFD.DDDFBFFFFBBFFEBFBBBBFEFFFFEBAFFFFEFFFF/FFBFF/9FF.
+@SRR1222430.8 8 length=251
+TATTGGTGCTGGGAGCGGGACAACTGGGCGCCGCCGTTCTCGATGCGCTGGTGCCTGCGGTAATCGAGCGCCAGGGCACGGTCTCGGTCATCGTCTCGCCGGCGGCCTGGGATGAAGCCGGCCAGCTGCGGTCGGCAAACCATCAGGCGCTGGCCGACGCCGGAGCCACCTTCCTCGCCGTCGACATCGCCGGTAGCGCCATGGAGACGCTGGCCGATCAGTTTCGTGGATTCACCACCGTGATTAACTGC
++SRR1222430.8 8 length=251
+AA?AAFFBFFFFGGCEGGGCEFGFHCEDGEGGGGGGEAFFFFB35>0EEGGGHGFFFCEGEEFFHGHG?EGCFG/E</EGGFDADB/CCDHDFGHHGGGCDGGC-:DDGEC./CGB:0C9-B@BEEBBBBGAB;;??=FFFFFFFFFFBB?BBFF<BB??BB?BBBEFFFFBBFFFFBBBBB??-ADB?DFBB9>DF-9@.A/BFFEADBDA?DFBB?@AFBB/FDAEAA/FFFFFFFAFAEEFFFF9BF/
+@SRR1222430.9 9 length=250
+AAGGCTATCTGGTTCGCGTACACATTCTCGATAAAGCCCGTTTTCCCGACTGTATCAGTGCCAAGAGACTGCCACTTGTCCCCGTTCTGCGTGGCGTTAATGACGACGGCATGGGTGTGTATCTGAGGTTCCTGGTTACGGTTCGTGTCGTGGTTGAATTTCGCCACAATCAGATTTCCGGTCAGCACCGTTTCGCTTTTACCGTCCGTCATGACCCGGGTCGCGGCCAGCGTCTCCAGTTGCCGCACCG
++SRR1222430.9 9 length=250
+ACCCCFFFFFFFGGGGGGGGGGHHHHHHHGHHHGHHHHHGGHHGHHHGGGGGHHHHHHHHHHHHHHHHGHHHHHHHHHHHHHHGGHHGHHGGGGGGGGGGHHHHGGGGGGGGHHHGGGGHHHHHHHHGGHHHHHHHHHHGGHGGGGGHHGGGGGFGGFHHHHHGGGGHGFHHHGGFFGGGGGGFGGGGECGGGBGFGFFFFFBDFFFFFFFFFFFFEFFBFFFFFFFFFEFFFF.FFBFFFFFFCA;9>B
+@SRR1222430.10 10 length=251
+CAACCAGGATTCCCCGCCGATGAAGTCGCCCAGGGCAACCTGCGCCAGCATCCGGAGCTGGAAGCCGGGCCGCAGGAGTTTTTAGCCGCTGGCGCCAGTTTTAACCAGATGGTGACGGCCCTGGAGCGGATGATGACCAGCCAGCAGCGGCTGCTGTCCGATATCTCGCACGAGCTGCGCACGCCGCTTACGCGCCTGCAATTGGGTACCGCCCTGCTGCGTCGCCGCAGCGGAGAGAGCAAGGAGCTGGG
++SRR1222430.10 10 length=251
+CCCCCCCCCFFFGGGGGGGGFGHHHHHGGGGGHGGGGGHHHHFGGGGGGGGHFFGFGGHHFCGHHFGGGGGGGGCCFGHEHHFHHHGGGGGGGGGGGF?FFFHFHHGHHHHHFGHHGGGGGHFGCGHCG?CFFHHFHFGAEGGGGGGGGGGGGGFFFGGDDDFFFFFFFFFADFFDBBDD=B=AAFF@D./EFCFFBEFFFFFFFFABFFF-CD;FEF/;@AFFFF=;BDFFFF=;.EFFFFF..AE.BB.