C12313211232233312111111312111133133313331333113332111323223121   >>    C1231321123223331211111131211113313331333133311333211132322312   <<    C12313211232233312111111312111133133313331333113332111323223123   >>      C12313211232233312111111312111133133313331333113332111323223122   >>