import sys
from typing import List, Tuple

int1 = lambda x: int(x) - 1
vi = lambda: list(map(int, input().split()))
vi1 = lambda: list(map(int1, input().split()))
input = lambda: sys.stdin.readline().rstrip('\n')


def dbg(*args, **kwargs):
    print(*(repr(arg) for arg in args), *(f'{k}: {repr(v)}' for k, v in kwargs.items()),
          sep='; ', file=sys.stderr, flush=True)


def main():
    n, m = map(int, input().split())
    z = {}
    for _ in range(n + m):
        a, b = input().split()
        z[a] = b
    for k, v in sorted(z.items()):
        print(k, v)


def _start():
    if (ret := main()) is not None:
        print(*ret) if isinstance(ret, List) or isinstance(ret, Tuple) else print(ret)


if __name__ == '__main__':
    _start()