C313212111133131211331333133313331333133313231333133313331333133313112233113121   >>    C31321211113313121133133313331333133313331323133313331333133313331311223311312   <<    C313212111133131211331333133313331333133313231333133313331333133313112233113123   >>      C313212111133131211331333133313331333133313231333133313331333133313112233113122   >>