C12313211232233312111111312111133133313331323133313331122332321123122112312131   >>    C1231321123223331211111131211113313331333132313331333112233232112312211231213   <<    C12313211232233312111111312111133133313331323133313331122332321123122112312133   >>      C12313211232233312111111312111133133313331323133313331122332321123122112312132   >>