C111112111133131121133133313331333133313331322121133133313221321   >>    C11111211113313112113313331333133313331333132212113313331322132   <<    C111112111133131121133133313331333133313331322121133133313221323   >>      C111112111133131121133133313331333133313331322121133133313221322   >>