C313212111133131211331333133313331333133313231333133313331333133311221123122121   >>    C31321211113313121133133313331333133313331323133313331333133313331122112312212   <<    C313212111133131211331333133313331333133313231333133313331333133311221123122123   >>      C313212111133131211331333133313331333133313231333133313331333133311221123122122   >>