C13112133313113313121111133313331333133313223211111333132322121   >>    C1311213331311331312111113331333133313331322321111133313232212   <<    C13112133313113313121111133313331333133313223211111333132322123   >>      C13112133313113313121111133313331333133313223211111333132322122   >>