#include <bits/stdc++.h>
using namespace std;
const long long infl = 1e18 + 5;
long long n, m, k, q, x, y, f, val, t, i, j;
long long ind, cnt, sz, sm, ans, mx, mn;
long long a, b;
long long modpow(long long a, long long b) {
  long long res = 1;
  while (b > 0) {
    if (b & 1) {
      res *= a;
      res %= 1000000009;
    }
    a *= a;
    b /= 2;
    a %= 1000000009;
  }
  return res;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  if (fopen("inp.txt", "r")) {
    freopen("myfile.txt", "w", stdout);
    freopen("inp.txt", "r", stdin);
  }
  string s;
  cin >> n >> a >> b >> k;
  cin >> s;
  val = 0;
  for (i = 0; i < k; i++) {
    x = modpow(a, n - i) * modpow(b, i) % 1000000009;
    if (s[i] == '+')
      val += x;
    else
      val -= x;
    val += 2LL * 1000000009;
    val %= 1000000009;
  }
  y = (n + 1) / k;
  long long r =
      modpow(b, k) * modpow(modpow(a, k), 1000000009 - 2LL) % 1000000009;
  if (r == 1) {
    ans = val * y % 1000000009;
    cout << ans;
    return 0;
  }
  long long num = (modpow(r, y) - 1LL + 1000000009) % 1000000009;
  long long den = (r - 1LL + 1000000009) % 1000000009;
  long long mden = modpow(den, 1000000009 - 2LL);
  val = val * num % 1000000009;
  ans = val * mden % 1000000009;
  cout << ans;
  return 0;
}
