#include<stdio.h>
int strcmp(char s[], char t[])
{
	int i;
	for (i = 0;; i++)
	{
		if (s[i] == '\0' && t[i] == '\0')
			return 0;
		if (t[i] == '\0')
			return 1;
		if (s[i] == '\0')
			return -1;
		if (s[i] > t[i])
			return 1;
		if (s[i] < t[i])
			return -1;
	}
}
char s[100005][64], t[100005][64];
int h[100005], l;
int comp_h(int a, int b)
{
	return strcmp(s[h[a]], s[h[b]]);
}
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++;
	for (; p > 0; p = (p - 1) / 2)
		if (comp_h((p - 1) / 2, p) > 0)
			swap_h((p - 1) / 2, p);
	return;
}
int pop()
{
	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 c[100005];
int main()
{
	int n, k;
	scanf("%d %d", &n, &k);
	int i;
	for (i = 0; i < n; i++)
		scanf("%s", s[i]);
	for (i = 0; i < n; i++)
		scanf("%s", t[i]);
	l = 0;
	for (i = 0; i < n; i++)
		push(i);
	for (i = 0; i < n; i++)
		c[i] = pop();
	int min, mid, max;
	for (i = 0; i < n; i++)
	{
		min = -1;
		max = n;
		while (max - min > 1)
		{
			mid = (max + min) / 2;
			if (strcmp(s[c[mid]], t[i]) < 0)
				min = mid;
			else
				max = mid;
		}
		if (i % k != c[max] % k)
		{
			printf("No\n");
			return 0;
		}
	}
	printf("Yes\n");
	return 0;
}