C12313211232233312111111312111133133313331323133313332322331212221213332213121   >>    C1231321123223331211111131211113313331333132313331333232233121222121333221312   <<    C12313211232233312111111312111133133313331323133313332322331212221213332213123   >>      C12313211232233312111111312111133133313331323133313332322331212221213332213122   >>