C1111233131211111211113313331333133313232313331333133313332131133231231   >>    C111123313121111121111331333133313331323231333133313331333213113323123   <<    C1111233131211111211113313331333133313232313331333133313332131133231233   >>      C1111233131211111211113313331333133313232313331333133313332131133231232   >>