C111123313121111121111331333133313331331121111113313331333133313232313221   >>    C11112331312111112111133133313331333133112111111331333133313331323231322   <<    C111123313121111121111331333133313331331121111113313331333133313232313223   >>      C111123313121111121111331333133313331331121111113313331333133313232313222   >>