#include<stdio.h>
char s[100005][32];
int h[100005], l;
int strcmp(char s[], char t[])
{
	int i;
	for (i = 0;; i++)
	{
		if (s[i] == '\0' && t[i] == '\0')
			return 0;
		if (s[i] == '\0')
			return -1;
		if (t[i] == '\0')
			return 1;
		if (s[i] > t[i])
			return 1;
		if (s[i] < t[i])
			return -1;
	}
}
int comp_h(int a, int b)
{
	if (strcmp(s[h[a]], s[h[b]]) != 0)
		return strcmp(s[h[a]], s[h[b]]);
	else if (h[a] > h[b])
		return -1;
	else
		return 1;
}
void swap_h(int a, int b)
{
	int f = h[a];
	h[a] = h[b];
	h[b] = f;
	return;
}
void push(int ne)
{
	h[l] = ne;
	int p = l;
	l++;
	for (; p > 0; p = (p - 1) / 2)
		if (comp_h((p - 1) / 2, p) > 0)
			swap_h((p - 1) / 2, p);
	return;
}
int pop()
{
	l--;
	swap_h(0, l);
	int p = 0;
	for (;;)
	{
		if (2 * p + 2 < l)
		{
			if (comp_h(2 * p + 1, 2 * p + 2) > 0)
			{
				if (comp_h(p, 2 * p + 2) > 0)
					swap_h(p, 2 * p + 2);
				p = 2 * p + 2;
			}
			else
			{
				if (comp_h(p, 2 * p + 1) > 0)
					swap_h(p, 2 * p + 1);
				p = 2 * p + 1;
			}
		}
		else if (2 * p + 1 < l)
		{
			if (comp_h(p, 2 * p + 1) > 0)
				swap_h(p, 2 * p + 1);
			p = 2 * p + 1;
		}
		else
			break;
	}
	return h[l];
}
int main()
{
	int n, m;
	scanf("%d %d", &n, &m);
	int a[100005];
	int i, j;
	for (i = 0; i < n + m; i++)
		scanf("%s%d", s[i], &a[i]);
	l = 0;
	for (i = 0; i < n + m; i++)
		push(i);
	j = pop();
	printf("%s %d\n", s[j], a[j]);
	while (l > 0)
	{
		i = pop();
		if (strcmp(s[j], s[i]) != 0)
			printf("%s %d\n", s[i], a[i]);
		j = i;
	}
	return 0;
}