C21221212121211331322132313132313231313232233132313223313231322211   >>    C2122121212121133132213231313231323131323223313231322331323132221   <<    C21221212121211331322132313132313231313232233132313223313231322213   >>      C21221212121211331322132313132313231313232233132313223313231322212   >>