#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <tuple>
#include <queue>
#include <numeric>
#include <set>
#include <map>
#include <random>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define piii pair<int, pii>
#define plll pair<long long, pll>
#define tiii array<int, 3>
#define tiiii array<int, 4>
#define ff first
#define ss second
#define ee ss.ff
#define rr ss.ss
typedef long long ll;
const int INF = (int)1e9 + 7;

using namespace std;

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);

	int n, m, k; cin >> n >> m >> k;
	int A[n];
	for(int i = 0; i < n; ++i)
	{
		char c;
		bool f1 = false, f2 = false;
		for(int j = 0; j < m; ++j)
		{
			cin >> c;
			if(c == '_') f1 = true;
		}
		cin >> c;
		for(int j = 0; j < k; ++j)
		{
			cin >> c;
			if(c == '*') f2 = true;
		}
		if(f1 && f2) return !(cout << "N");
	}
	cout << "Y";
}