diff --git a/main.py b/main.py
new file mode 100644
index 0000000..bf35448
--- /dev/null
+++ b/main.py
@@ -0,0 +1,11 @@
+with open('dev-0/out.tsv', 'w', newline='\n') as fout:
+    with open('dev-0/in.tsv', encoding='utf-8') as fin:
+        for line in fin.readlines():
+            prob1 = len(line) % 5 + 1
+            prob1 = round(prob1/10, 1)
+            prob2 = round(0.9 - prob1, 1)
+            prob3 = round(1 - prob1 - prob2, 1)
+            word = 'on' if prob1 < 0.3 else 'in'
+            result = f'{word}:{prob1} a:{prob2} :{prob3}\n'
+            print(result)
+            fout.write(result)