C21221212121211331322132313132313132313232233132313223313231323123232212111   >>    C2122121212121133132213231313231313231323223313231322331323132312323221211   <<    C21221212121211331322132313132313132313232233132313223313231323123232212113   >>      C21221212121211331322132313132313132313232233132313223313231323123232212112   >>