C313212111133131211331333133313331333133312111133133313331333133313232212122121   >>    C31321211113313121133133313331333133313331211113313331333133313331323221212212   <<    C313212111133131211331333133313331333133312111133133313331333133313232212122123   >>      C313212111133131211331333133313331333133312111133133313331333133313232212122122   >>