C313212111133131211331333133313331333133311233133313221211111313232321   >>    C31321211113313121133133313331333133313331123313331322121111131323232   <<    C313212111133131211331333133313331333133311233133313221211111313232323   >>      C313212111133131211331333133313331333133311233133313221211111313232322   >>