C21221212121211331322132313132313231313232233132313223313231133132322123221   >>    C2122121212121133132213231313231323131323223313231322331323113313232212322   <<    C21221212121211331322132313132313231313232233132313223313231133132322123223   >>      C21221212121211331322132313132313231313232233132313223313231133132322123222   >>