C21221212121211331322132313132313231313232233132313223313231323211221   >>    C2122121212121133132213231313231323131323223313231322331323132321122   <<    C21221212121211331322132313132313231313232233132313223313231323211223   >>      C21221212121211331322132313132313231313232233132313223313231323211222   >>