C312312111133131212111133133313231333133313331333112331323222221   >>    C31231211113313121211113313331323133313331333133311233132322222   <<    C312312111133131212111133133313231333133313331333112331323222223   >>      C312312111133131212111133133313231333133313331333112331323222222   >>