C111112111133131121133133313331333133313331323133313331333133313221331123231321   >>    C11111211113313112113313331333133313331333132313331333133313331322133112323132   <<    C111112111133131121133133313331333133313331323133313331333133313221331123231323   >>      C111112111133131121133133313331333133313331323133313331333133313221331123231322   >>