while True: try: num = input() num1 = list(map(int, input().split())) num2 = list(map(int, input().split())) res = [] while len(num1) or len(num2): if not len(num1): res += num2 break if not len(num2): res += num1 break if num1[0] < num2[0]: res.append(num1.pop(0)) else: res.append(num2.pop(0)) for re in res: print(re, end = ' ') except: break