C1111233131211111211113313331333133313331333133313331333133313221213123231   >>    C111123313121111121111331333133313331333133313331333133313331322121312323   <<    C1111233131211111211113313331333133313331333133313331333133313221213123233   >>      C1111233131211111211113313331333133313331333133313331333133313221213123232   >>