C111112111133131121133133313331333133313331323133313331333132313233231211   >>    C11111211113313112113313331333133313331333132313331333133313231323323121   <<    C111112111133131121133133313331333133313331323133313331333132313233231213   >>      C111112111133131121133133313331333133313331323133313331333132313233231212   >>