C1111233131211111211113313331333133313331333133313331333133313232333112331   >>    C111123313121111121111331333133313331333133313331333133313331323233311233   <<    C1111233131211111211113313331333133313331333133313331333133313232333112333   >>      C1111233131211111211113313331333133313331333133313331333133313232333112332   >>