C21221212121211331322132313132313231313232233132313223313231333133313132213111   >>    C2122121212121133132213231313231323131323223313231322331323133313331313221311   <<    C21221212121211331322132313132313231313232233132313223313231333133313132213113   >>      C21221212121211331322132313132313231313232233132313223313231333133313132213112   >>