diff --git a/tetromino.py b/tetromino.py
index 6f2288a..3a06c9a 100644
--- a/tetromino.py
+++ b/tetromino.py
@@ -199,8 +199,8 @@ class Tetromino():
         elif mode == 3:
             offset_map= {
                 'i': {0: 8, 1: 10, 2: 8, 3: 10},
-                'a': {0: 9, 1: 9, 2: 9, 3: 9},
-                'b': {0: 9, 1: 9, 2: 9, 3: 9},
+                'a': {0: 8, 1: 9, 2: 8, 3: 9},
+                'b': {0: 8, 1: 9, 2: 8, 3: 9},
                 'c': {0: 8, 1: 8, 2: 8, 3: 8},
                 'o': {0: 9, 1: 9, 2: 9, 3: 9},
                 'd': {0: 9, 1: 9, 2: 9, 3: 9},