diff --git a/parser.py b/parser.py
index 0c4ec9d..6770128 100644
--- a/parser.py
+++ b/parser.py
@@ -1,6 +1,6 @@
 from argparse import ArgumentParser
 from glob import glob
-from typing import List
+from typing import Dict, List, Tuple
 
 from pandas import DataFrame, read_html, Series
 
@@ -10,14 +10,18 @@ def find_html_files(path) -> List:
     return file_list
 
 
-def extract_adapters(files) -> Series:
+def extract_adapters(files) -> Tuple[Series, Dict]:
     all_adapters = DataFrame()
     for entry in files:
         tables = read_html(entry)
         adapter_sequences = tables[1].Sequence
         all_adapters = all_adapters.append(adapter_sequences)
     processed_adapters = preprocess_dataframe(all_adapters)
-    return processed_adapters
+    stats = [
+        processed_adapters.str.len().mean(),
+        processed_adapters.str.len().std(),
+    ]
+    return processed_adapters, stats
 
 
 def preprocess_dataframe(adapters) -> Series:
@@ -44,8 +48,11 @@ def parse_arguments():
 def main():
     args = parse_arguments()
     file_list = find_html_files(args.input)
-    adapters = extract_adapters(file_list)
+    adapters, stats = extract_adapters(file_list)
     save_to_file(args.output, adapters)
+    print(
+        f"Mean of sequence length: {stats[0]}, standard deviation of sequence length {stats[1]}"
+    )
 
 
 if __name__ == "__main__":