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