#include <bits/stdc++.h>

using namespace std;

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef double db;

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	int h, w, n;
	cin >> h >> w >> n;
	vector<string> s(h * n);
	FOR (i, 0, h * n)
		cin >> s[i];
	vector<string> f(h);
	FOR (i, 0, h)
		cin >> f[i];
	int cnt = 0;
	FOR (i, 0, n)
	{
		bool ok = true;
		FOR (j, 0, h)
		{
			FOR (k, 0, w)
			{
				if (s[i * h + j][k] == '.' && f[j][k] == 'x')
					ok = false;
			}
		}
		if (ok)
			cnt++;
	}
	cout << (cnt == 1 ? "yes" : "no") << '\n';
	
	return 0;
}