#include <bits/stdc++.h>
char s[100005];
long long powa[100005], powb[100005];
long long powm(long long a, long long b) {
  long long ret = 1;
  while (b) {
    if (b & 1LL) ret = (ret * a) % 1000000009LL;
    a = (a * a) % 1000000009LL;
    b >>= 1;
  }
  return ret;
}
int main() {
  long long n, a, b, k, t, ans, p;
  scanf("%I64d%I64d%I64d%I64d", &n, &a, &b, &k);
  scanf("%s", s);
  powa[k - 1] = powm(a, n - k + 1);
  powb[0] = 1;
  for (long long i = k - 2; i >= 0; i--)
    powa[i] = powa[i + 1] * a % 1000000009LL;
  for (long long i = 1; i < k; i++) powb[i] = powb[i - 1] * b % 1000000009LL;
  t = 0;
  for (long long i = 0; i < k; i++)
    if (s[i] == '+')
      t = (t + powa[i] * powb[i] % 1000000009LL) % 1000000009LL;
    else if (s[i] == '-')
      t = (t - powa[i] * powb[i] % 1000000009LL + 1000000009LL) % 1000000009LL;
  p = powm(a, 1000000009LL - 2);
  p = powm(p, k) * powm(b, k) % 1000000009LL;
  if (p == 1)
    ans = t * ((n + 1) / k) % 1000000009LL;
  else
    ans = (t * powm(p, (n + 1) / k) % 1000000009LL - t + 1000000009LL) %
          1000000009LL *
          powm((p + 1000000009LL - 1) % 1000000009LL, 1000000009LL - 2) %
          1000000009LL;
  printf("%I64d\n", ans);
  return 0;
}
