C111123313331323113313331333133313331323132333132333132313233313221111   >>    C11112331333132311331333133313331333132313233313233313231323331322111   <<    C111123313331323113313331333133313331323132333132333132313233313221113   >>      C111123313331323113313331333133313331323132333132333132313233313221112   >>