"""" 有序链表合并,条件判断 """ if __name__ == "__main__": a = list(map(int, input().strip().split())) b = list(map(int, input().strip().split())) ans = [] i = j = 0 while i < len(a) and j < len(b): if a[i] < b[j]: ans.append(a[i]) i += 1 else: ans.append(b[j]) j += 1 ans += a[i:] ans += b[j:] print(' '.join(map(str, ans)))