C21221212121211331322132313132313132313232233132313223313233313233313232111   >>    C2122121212121133132213231313231313231323223313231322331323331323331323211   <<    C21221212121211331322132313132313132313232233132313223313233313233313232113   >>      C21221212121211331322132313132313132313232233132313223313233313233313232112   >>