#include <bits/stdc++.h>

using namespace std;
#define int long long

void solve() {
    int R, C, K;
    cin >> R >> C >> K;

    vector<string> s(R + 1), t(R + 1);
    int ret = 1;

    for (int i = 1; i <= R; i++) {
        cin >> s[i] >> t[i];
        int ok = 1, num = K;
        for (auto x : s[i]) {
            if(x == '-') {
                ok = 0;
            }
        }
        for (auto x : t[i]) {
            if(x == '*' && ok == 0) {
                ret = 0;
            }
        }
    }

    if(ret) {
        cout << "Y\n";
    } else {
        cout << "N\n";
    }

}


signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    // cin >> t;
    while(t--) {
        solve();
    }
}