diff --git a/transposition-trial/message.txt b/transposition-trial/message.txt
new file mode 100755
index 0000000..9d591b8
--- /dev/null
+++ b/transposition-trial/message.txt
@@ -0,0 +1 @@
+heTfl g as iicpCTo{7F4NRP051N5_16_35P3X51N3_V9AAB1F8}7
\ No newline at end of file
diff --git a/transposition-trial/sol.py b/transposition-trial/sol.py
new file mode 100755
index 0000000..57f29f5
--- /dev/null
+++ b/transposition-trial/sol.py
@@ -0,0 +1,11 @@
+#!/home/maxime/.pyvenv/bin/python3
+
+with open("message.txt", 'r') as f:
+    text = f.read().strip()
+    decoded = ""
+    for i in range(len(text)):
+        k = i // 3
+        j = (i-1)%3
+        decoded += text[3*k+j]
+    print(decoded)
+