C21221212121211331322132313132313231313232233132313223313123231   >>    C2122121212121133132213231313231323131323223313231322331312323   <<    C21221212121211331322132313132313231313232233132313223313123233   >>      C21221212121211331322132313132313231313232233132313223313123232   >>