C111123313121111121111331333133313331333112221211111133133313233123232311   >>    C11112331312111112111133133313331333133311222121111113313331323312323231   <<    C111123313121111121111331333133313331333112221211111133133313233123232313   >>      C111123313121111121111331333133313331333112221211111133133313233123232312   >>