C21221212121211331322132313132313231313232233132313223313231323331323221211   >>    C2122121212121133132213231313231323131323223313231322331323132333132322121   <<    C21221212121211331322132313132313231313232233132313223313231323331323221213   >>      C21221212121211331322132313132313231313232233132313223313231323331323221212   >>