you can guess

2pt2.py

@@ -0,0 +1,17 @@
+with open("input2_pre.txt") as f:
+    s = 0
+    for line in f.readlines():
+        a, b = [int(a) for a in line.strip().split()]
+        b = {
+            (1, 1): 3,
+            (1, 2): 1,
+            (1, 3): 2,
+            (2, 1): 1,
+            (2, 2): 2,
+            (2, 3): 3,
+            (3, 1): 2,
+            (3, 2): 3,
+            (3, 3): 1,
+        }[(a, b)]
+        s += b + ((3, 0, 6)[((a - b) % 3)])
+    print(s)