C12313211232233312111111312111133133313331323133313332322331212222131113233231   >>    C1231321123223331211111131211113313331333132313331333232233121222213111323323   <<    C12313211232233312111111312111133133313331323133313332322331212222131113233233   >>      C12313211232233312111111312111133133313331323133313332322331212222131113233232   >>