n = int(input()) m = [] for i in range(n): m.append(list(map(int,input().split()))) for i in m: flag = True a,b,c = i[0],i[1],i[2] for j in range(1,9999//a+9999%a+1): x = a*j if x < 1000: continue if (x+1)%b == 0 and (x+2)%c == 0: print(x) flag = False break if flag: print('Impossible')