C12313211232233312111111312111133133313331323133313331122332321123122112121121   >>    C1231321123223331211111131211113313331333132313331333112233232112312211212112   <<    C12313211232233312111111312111133133313331323133313331122332321123122112121123   >>      C12313211232233312111111312111133133313331323133313331122332321123122112121122   >>