C12313211232233312111111312111133133313331333222233113322322221   >>    C1231321123223331211111131211113313331333133322223311332232222   <<    C12313211232233312111111312111133133313331333222233113322322223   >>      C12313211232233312111111312111133133313331333222233113322322222   >>