C313212111133131211331333133313331333133311233133313113313232321333132313231211   >>    C31321211113313121133133313331333133313331123313331311331323232133313231323121   <<    C313212111133131211331333133313331333133311233133313113313232321333132313231213   >>      C313212111133131211331333133313331333133311233133313113313232321333132313231212   >>