C12313211232233312111111312111133133313331323133313332322331212222131133221211   >>    C1231321123223331211111131211113313331333132313331333232233121222213113322121   <<    C12313211232233312111111312111133133313331323133313332322331212222131133221213   >>      C12313211232233312111111312111133133313331323133313332322331212222131133221212   >>