C313212111133131211331333133313331333133313231333133313331333133313232232221   >>    C31321211113313121133133313331333133313331323133313331333133313331323223222   <<    C313212111133131211331333133313331333133313231333133313331333133313232232223   >>      C313212111133131211331333133313331333133313231333133313331333133313232232222   >>