C313212111133131211331333133313331333133313231333133313331333133112133313221211   >>    C31321211113313121133133313331333133313331323133313331333133313311213331322121   <<    C313212111133131211331333133313331333133313231333133313331333133112133313221213   >>      C313212111133131211331333133313331333133313231333133313331333133112133313221212   >>