C1111233131211111211113313331333133313232313331333131211113311211313221   >>    C111123313121111121111331333133313331323231333133313121111331121131322   <<    C1111233131211111211113313331333133313232313331333131211113311211313223   >>      C1111233131211111211113313331333133313232313331333131211113311211313222   >>