C1111233131211111211113313331333133313331312331333133112111323311   >>    C111123313121111121111331333133313331333131233133313311211132331   <<    C1111233131211111211113313331333133313331312331333133112111323313   >>      C1111233131211111211113313331333133313331312331333133112111323312   >>