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****.

no yes no no no yes yes no yes yes yes yes yes yes no yes yes yes yes yes yes yes yes yes yes yes no no no yes yes yes yes no no yes yes yes yes yes no yes yes no no no yes yes no yes yes no no no yes yes yes yes no yes yes yes no
#include <bits/stdc++.h>
using namespace std;
const double eps = 1e-9;
const int maxn = (int)1e5 + 10;
const int mod = (int)1e9 + 7;
int dx[] = {0, 0, 1, -1, 1, -1, 1, -1};
int dy[] = {1, -1, 0, 0, 1, -1, -1, 1};
long long a, b, c, d, i, j, k, l, t, n, m, p, cs, kk, q, r, s;
char h[1000], o;
double e, f, g;
vector<long long> u, v, w;
vector<pair<long long, long long> > pv;
pair<long long, long long> pp;
string x, y, z;
map<string, long long> mm;
int main() {
  while (cin >> a >> x) {
    b = 0;
    for (i = 0; i < (a - 4); i++) {
      for (j = 1; j < 25; j++) {
        b = 0;
        k = i;
        while (k < a) {
          if (x[k] == '*')
            b++;
          else
            break;
          if (b == 5) {
            cout << i << " " << j << endl;
            goto pp;
          }
          k += j;
        }
      }
    }
  pp:
    if (b == 5)
      printf("YES\n");
    else
      printf("NO\n");
  }
  return 0;
}
