#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll MOD = 1e9 + 9;
ll modPow(ll a, ll b) {
  if (b == 0) return 1;
  if (b & 1) return a * modPow(a, b - 1) % MOD;
  return modPow(a * a % MOD, b / 2);
}
ll geom(ll a, ll b) {
  if (a == 1)
    return b + 1;
  else if (a == 0)
    return 1;
  ll divi = (modPow(a, b + 1) + MOD - 1) % MOD;
  ll divs = modPow((a + MOD - 1) % MOD, MOD - 2);
  return divi * divs % MOD;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  ll n, a, b, k;
  cin >> n >> a >> b >> k;
  ll t0 = modPow(a, n);
  a = modPow(a, MOD - 2);
  ll ab = a * b % MOD;
  ll mult = modPow(ab % MOD, k);
  ll sp = 0;
  string str;
  cin >> str;
  for (int i = 0; i < k; ++i) {
    if (str[i] == '+') {
      sp += t0;
    } else {
      sp += (MOD - t0) % MOD;
    }
    t0 = (t0 * ab) % MOD;
  }
  sp %= MOD;
  ll res = sp * geom(mult, (n + 1) / k - 1) % MOD;
  cout << res << '\n';
}
