diff --git a/README.md b/README.md
index e9b096d6c251954124bd8c13fd6046237e0ab423..7b63bf5c6915c846afa2629d145da2bf4f49ed43 100644
--- a/README.md
+++ b/README.md
@@ -173,6 +173,33 @@ Design columns:
 Link to an Example: [design.txt](https://gitlab.pasteur.fr/hub/ePeak/-/blob/master/test/design.txt)
 
 
+**Example of config file and associated fastq file:**
+
+For an experiment with one mark (H3K27ac) and 2 conditions (shCtrl and shUbc9) in duplicates, except for one INPUT which have failed. The list of fastq is the following :
+
+```
+H3K27ac_shCtrl_rep1_R1.fastq.gz
+H3K27ac_shCtrl_rep2_R1.fastq.gz
+INPUT_shCtrl_rep1_R1.fastq.gz
+H3K27ac_shUbc9_rep1_R1.fastq.gz	
+H3K27ac_shUbc9_rep2_R1.fastq.gz	
+INPUT_shUbc9_rep1_R1.fastq.gz
+INPUT_shUbc9_rep2_R1.fastq.gz
+
+```
+For this experiment, the config file should be :
+
+```
+IP_NAME	INPUT_NAME	NB_IP	NB_INPUT
+H3K27ac_shCtrl	INPUT_shCtrl	1	1
+H3K27ac_shCtrl	INPUT_shCtrl	2	1
+H3K27ac_shUbc9	INPUT_shUbc9	1	1
+H3K27ac_shUbc9	INPUT_shUbc9	2	2
+```
+
+IP of the first condition are linked to the unique INPUT, and each IP file of second condition is linked to his INPUT.
+
+
 ### How to fill the config file
 
 All the parameters to run the pipeline are gathered in a YAML config file that the user has to fill before running the pipeline. Here is an filled example: [config.yaml](https://gitlab.pasteur.fr/hub/ePeak/-/blob/master/test/config.yaml)