C12313211232233312111111312111133133313331333113332211332323131   >>    C1231321123223331211111131211113313331333133311333221133232313   <<    C12313211232233312111111312111133133313331333113332211332323133   >>      C12313211232233312111111312111133133313331333113332211332323132   >>