C12313211232233312111111312111133133313331323133313331122332321222221223231   >>    C1231321123223331211111131211113313331333132313331333112233232122222122323   <<    C12313211232233312111111312111133133313331323133313331122332321222221223233   >>      C12313211232233312111111312111133133313331323133313331122332321222221223232   >>