C111112111133131121133133313331323133313221131211113313113313331333112123311   >>    C11111211113313112113313331333132313331322113121111331311331333133311212331   <<    C111112111133131121133133313331323133313221131211113313113313331333112123313   >>      C111112111133131121133133313331323133313221131211113313113313331333112123312   >>