C313212111133131211331333133313331333133313231333133313331333133313112221312121   >>    C31321211113313121133133313331333133313331323133313331333133313331311222131212   <<    C313212111133131211331333133313331333133313231333133313331333133313112221312123   >>      C313212111133131211331333133313331333133313231333133313331333133313112221312122   >>