C111123313121111121111331333133313331323232133313331333133313113313331313232211   >>    C11112331312111112111133133313331333132323213331333133313331311331333131323221   <<    C111123313121111121111331333133313331323232133313331333133313113313331313232213   >>      C111123313121111121111331333133313331323232133313331333133313113313331313232212   >>