C313212111133131211331333133313331333133311233133313221211111212133121   >>    C31321211113313121133133313331333133313331123313331322121111121213312   <<    C313212111133131211331333133313331333133311233133313221211111212133123   >>      C313212111133131211331333133313331333133311233133313221211111212133122   >>