C313212111133131211331333133313331333133313331333133313231333133313233232223221   >>    C31321211113313121133133313331333133313331333133313331323133313331323323222322   <<    C313212111133131211331333133313331333133313331333133313231333133313233232223223   >>      C313212111133131211331333133313331333133313331333133313231333133313233232223222   >>