n = int(input()) for t in range(n): a,b,c = input().split() #有解，Impossbile a,b,c = int(a),int(b),int(c) for x in range(1000,9999+1): #1000<=x<=9999 if x % a == 0 and (x+1)%b==0 and (x+2) % c == 0: print(x) break else: print('Impossible')