C21221212121211331322132313132313132313232233132313223313231333133313112333121   >>    C2122121212121133132213231313231313231323223313231322331323133313331311233312   <<    C21221212121211331322132313132313132313232233132313223313231333133313112333123   >>      C21221212121211331322132313132313132313232233132313223313231333133313112333122   >>