C12313211232233312111111312111133133313331323133313332221331212122331221   >>    C1231321123223331211111131211113313331333132313331333222133121212233122   <<    C12313211232233312111111312111133133313331323133313332221331212122331223   >>      C12313211232233312111111312111133133313331323133313332221331212122331222   >>