C313212111133131211331333133313331333133311233133313233313233313221211   >>    C31321211113313121133133313331333133313331123313331323331323331322121   <<    C313212111133131211331333133313331333133311233133313233313233313221213   >>      C313212111133131211331333133313331333133311233133313233313233313221212   >>