C312312111133131212111133133313231333133313331322121111331333112221221   >>    C31231211113313121211113313331323133313331333132212111133133311222122   <<    C312312111133131212111133133313231333133313331322121111331333112221223   >>      C312312111133131212111133133313231333133313331322121111331333112221222   >>