mod = 1000000007 eps = 10**-9 def main(): import sys input = sys.stdin.readline P, Q, x, y = map(int, input().split()) if y % 10 == 0: y += Q N = str(y)[::-1] m = int(N) % P if m != 0: while True: y += Q N = str(y)[::-1] m = int(N) % P if m: break print(N, m) cnt = 0 while m != x: cnt += 1 m = (m * 10)%P print(N + "0" * cnt) if __name__ == '__main__': main()