c = int(input()) for _ in range(c): a, b, c_val = map(int, input().split()) x_start = ((1000 + a - 1) // a) * a x_end = (9999 // a) * a found = False if x_start > 9999: print("Impossible") continue for x in range(x_start, x_end + 1, a): if (x + 1) % b == 0 and (x + 2) % c_val == 0: print(x) found = True break if not found: print("Impossible")