C111123313331323113313331333133313331323132333133313331312211211   >>    C11112331333132311331333133313331333132313233313331333131221121   <<    C111123313331323113313331333133313331323132333133313331312211213   >>      C111123313331323113313331333133313331323132333133313331312211212   >>