#include<iostream>
#include<string>
#include<cstdio>
#include<vector>
#include<cmath>
#include<algorithm>
#include<functional>
#include<iomanip>
#include<queue>
#include<ciso646>
#include<random>
#include<map>
#include<set>
#include<bitset>
#include<stack>
#include<unordered_map>
#include<utility>
#include<cassert>
#include<complex>
#include<numeric>
#include<array>
using namespace std;

//#define int long long
typedef long long ll;

typedef unsigned long long ul;
typedef unsigned int ui;
constexpr ll mod = 1000000007;
const ll INF = mod * mod;
typedef pair<int, int>P;
#define stop char nyaa;cin>>nyaa;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define Rep(i,sta,n) for(int i=sta;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define per1(i,n) for(int i=n;i>=1;i--)
#define Rep1(i,sta,n) for(int i=sta;i<=n;i++)
#define all(v) (v).begin(),(v).end()
typedef pair<ll, ll> LP;
typedef double ld;
typedef pair<ld, ld> LDP;
const ld eps = 1e-12;
const ld pi = acosl(-1.0);

ll mod_pow(ll x, ll n, ll m) {
	ll res = 1;
	while (n) {
		if (n & 1)res = res * x % m;
		x = x * x % m; n >>= 1;
	}
	return res;
}
struct modint {
	ll n;
	modint() :n(0) { ; }
	modint(ll m) :n(m) {
		if (n >= mod)n %= mod;
		else if (n < 0)n = (n % mod + mod) % mod;
	}
	operator int() { return n; }
};
bool operator==(modint a, modint b) { return a.n == b.n; }
modint operator+=(modint& a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= mod; return a; }
modint operator-=(modint& a, modint b) { a.n -= b.n; if (a.n < 0)a.n += mod; return a; }
modint operator*=(modint& a, modint b) { a.n = ((ll)a.n * b.n) % mod; return a; }
modint operator+(modint a, modint b) { return a += b; }
modint operator-(modint a, modint b) { return a -= b; }
modint operator*(modint a, modint b) { return a *= b; }
modint operator^(modint a, ll n) {
	if (n == 0)return modint(1);
	modint res = (a * a) ^ (n / 2);
	if (n % 2)res = res * a;
	return res;
}

ll inv(ll a, ll p) {
	return (a == 1 ? 1 : (1 - p * inv(p % a, a)) / a + p);
}
modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); }

const int max_n = 1 << 18;
modint fact[max_n], factinv[max_n];
void init_f() {
	fact[0] = modint(1);
	for (int i = 0; i < max_n - 1; i++) {
		fact[i + 1] = fact[i] * modint(i + 1);
	}
	factinv[max_n - 1] = modint(1) / fact[max_n - 1];
	for (int i = max_n - 2; i >= 0; i--) {
		factinv[i] = factinv[i + 1] * modint(i + 1);
	}
}
modint comb(int a, int b) {
	if (a < 0 || b < 0 || a < b)return 0;
	return fact[a] * factinv[b] * factinv[a - b];
}

ul gcd(ul a, ul b) {
	if (a < b)swap(a, b);
	while (b) {
		ul r = a % b; a = b; b = r;
	}
	return a;
}

using UP = pair<ul, ul>;
using speP = pair<UP, int>;

ul sup = (ul)1 << 62;
ul multi(ul a, ul b) {
	if (a == 0)return 0;
	if (sup / a < b)return sup;
	else return a * b;
}
ul calc(ul x, ul y) {
	if (x - y < y)y = x - y;
	if (y == 0)return 1;
	else if (y == 1)return x;
	vector<ul> v;
	rep(i, y) {
		v.push_back(x - i);
	}
	rep1(i, y) {
		ul cop = i;
		rep(j, v.size()) {
			if (cop == 1)break;
			ul g = gcd(v[j], cop);
			v[j] /= g; cop /= g;
		}
	}
	ul res = 1;
	rep(j, v.size()) {
		res = multi(res, v[j]);
	}
	return res;
}
ul calc(vector<int> vs, ul s){
	if (vs.empty())return 1;
	if (s == 0)return 1;
	vector<ul> cur(vs.size());
	//cout << "hello\n";
	ul sum = 0;
	rep(i, vs.size())sum += vs[i];
	ul d = s / sum;
	ul res = 1;
	s -= d * sum;
	//cout << s << " ?\n";
	auto comp = [](const speP a, const speP b) {
		ul cl = a.first.first * b.first.second;
		ul cr = a.first.second * b.first.first;
		if (cl != cr)return cl < cr;
		else return a.second < b.second;
	};
	priority_queue<speP, vector<speP>, function<bool(speP,speP)>> q(
		[](speP a, speP b) {
			ul cl = a.first.first * b.first.second;
			ul cr = a.first.second * b.first.first;
			if (cl != cr)return cl < cr;
			else return a.second < b.second;
		}
	);
	//cout << "hoee\n";
	rep(i, vs.size()) {
		cur[i] = vs[i] * d;
		ul x = vs[i] + cur[i];
		ul y = vs[i];
		ul z = calc(x, y);
		res = multi(res, z);
		if (res >= sup)return sup;
		ul g = gcd(vs[i], cur[i] + 1);
		q.push({ {(vs[i])/g,(cur[i] + 1)/g},i });
	}
	//cout << "?? " << res << "\n";
	rep (aa,s) {
		speP p = q.top(); q.pop();
		int id = p.second;
		//cout << p.first.first << " " << p.first.second << "\n";
		res /= p.first.second;
		res = multi(res, p.first.second+p.first.first);
		//cout << res << "\n";
		if (res >= sup)return sup;
		cur[id]++;
		ul g = gcd(vs[id], cur[id] + 1);
		q.push({ {vs[id]/g,(cur[id] + 1)/g},id });
	}
	//cout << res << "\n";
	return res;
}
void solve() {
	vector<ll> alf(26);
	rep(i, 26)cin >> alf[i];
	string s; cin >> s;
	string t; vector<int> num;
	rep(i, s.size()) {
		int cnt = 1;
		while (i + 1 < s.size() && s[i] == s[i + 1]) {
			cnt++; i++;
		}
		t.push_back(s[i]);
		num.push_back(cnt);
	}
	rep(i, t.size()) {
		alf[t[i] - 'a'] -= num[i];
	}
	rep(i, 26)if (alf[i] < 0) {
		cout << 0 << "\n"; return;
	}

	vector<int> nums[26];
	rep(i, t.size()) {
		nums[t[i] - 'a'].push_back(num[i]);
	}
	ul ans = 1;
	rep(i, 26) {
		//cout << char('a' + i) << "\n";
		ans = multi(ans, calc(nums[i], alf[i]));
	}
	if (ans >= sup)cout << "hel\n";
	else cout << ans << "\n";
}

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	//cout << fixed << setprecision(10);
	//init_f();
	//expr();
	//int t; cin >> t; rep(i, t)
	//while (cin >> n >> m>>s1>>s2>>t, n)
	solve();
	return 0;
}