C111123313331323113313331333133313331323133113313112211232313121   >>    C11112331333132311331333133313331333132313311331311221123231312   <<    C111123313331323113313331333133313331323133113313112211232313123   >>      C111123313331323113313331333133313331323133113313112211232313122   >>