nghiem =[(a,c,d,e,f,g,h,i) for a in range(10) for b in range(10) for c in range(1,10) for d in range(10) for e in range(10) for f in range(10) for g in range(10) for h in range(10) for i in range(1,10) if a + 13 * b / c + d + 12 * e - f - 11 + g * h / i - 10 == 66] print(nghiem)