C12313211232233312111111312111133133313331323133313332322331212222121111311   >>    C1231321123223331211111131211113313331333132313331333232233121222212111131   <<    C12313211232233312111111312111133133313331323133313332322331212222121111313   >>      C12313211232233312111111312111133133313331323133313332322331212222121111312   >>