C21221212121211331322132313132313132313232233132313223313231323123232212121   >>    C2122121212121133132213231313231313231323223313231322331323132312323221212   <<    C21221212121211331322132313132313132313232233132313223313231323123232212123   >>      C21221212121211331322132313132313132313232233132313223313231323123232212122   >>