diff --git a/basic_mod1/message.txt b/basic_mod1/message.txt
new file mode 100755
index 0000000..940caf6
--- /dev/null
+++ b/basic_mod1/message.txt
@@ -0,0 +1 @@
+128 322 353 235 336 73 198 332 202 285 57 87 262 221 218 405 335 101 256 227 112 140 
\ No newline at end of file
diff --git a/basic_mod1/sol.py b/basic_mod1/sol.py
new file mode 100755
index 0000000..f086db4
--- /dev/null
+++ b/basic_mod1/sol.py
@@ -0,0 +1,19 @@
+#!/home/maxime/.pyvenv/bin/python3
+
+with open("message.txt", 'r') as f:
+    text = f.read().strip()
+
+    cipher = text.split(' ')
+
+    dec = ""
+    for i in cipher:
+        i = int(i)
+        i %= 37
+        if i <= 25:
+            dec += chr(ord('a') + i)
+        elif i <= 35:
+            dec += chr(ord('0') + i - 26)
+        elif i == 36:
+            dec += '_'
+    print(dec)
+