#include <bits/stdc++.h>
std::vector<int> KMPed(const std::string &a, std::string g) {
	g = '`' + g;
	std::vector<int> b(g.length(), 0);
	b[0] = -1;
	for(int i = 1; i < g.length(); i++) {
		int p = b[i - 1];
		while(p != -1)
			if(g[p + 1] != g[i])
				p = b[p];
			else
				break;
		b[i] = p + 1;
	}
	std::vector<int> res;
	int k = 0;
	for(int i = 0; i < a.length(); i++) {
		while(k >= 0 && a[i] != g[k + 1])
			k = b[k];
		k++;
		if(k == g.length() - 1)
			res.push_back(i), k = b[k];
	}
	return res;
}
constexpr long long Inf = 3141592653589793238LL;
char a[262144], b[262144];
int n, m, t[262144];
long long st[262144];
std::array<int, 32> bl, br;
std::array<long long, 262144> f, g;
std::vector<int> u;
int main() {
	scanf("%s%s", a + 1, b + 1), n = strlen(a + 1), m = strlen(b + 1);
	for(int i = 1; i <= n; i++)
		a[i] -= '`';
	for(int i = 1; i <= m; i++)
		b[i] -= '`';
	for(int i = 1; i <= n; i++)
		scanf("%d", &t[i]);
	bl.fill(m), br.fill(1);
	for(int i = 1; i <= m; i++)
		bl[b[i]] = std::min(bl[b[i]], i),
		br[b[i]] = std::max(br[b[i]], i);
	for(int i = 0; i <= 26; i++)
		u.push_back(bl[i]), u.push_back(br[i] + 1);
	std::sort(u.begin(), u.end()),
	u.erase(std::unique(u.begin(), u.end()), u.end());
	f[0] = -Inf;
	for(int j = 1; j <= n; j++)
		f[j] = std::min(f[j], f[j - 1] + t[j]);
	for(int i = 1; i < u.size(); i++) {
		std::string filt;
		std::bitset<32> has;
		std::vector<int> filtered;
		for(int j = 1; j <= 26; j++)
			has[j] = bl[j] <= u[i - 1] && u[i] - 1 <= br[j];
		for(int j = 1; j <= n; j++)
			if(has[a[j]])
				filt.push_back(a[j]), filtered.push_back(j);
		for(int j = 1; j <= n; j++)
			st[j] = st[j - 1] + (has[a[j]] ? 0 : t[j]);
		for(int j = 1; j <= n; j++)
			if(!has[a[j]] || bl[j] == u[i - 1])
				f[j] = std::min(f[j], f[j - 1] + t[j]);
		std::vector<int> yes = KMPed(filt, std::string(b + u[i - 1], b + u[i]));
		g.fill(0);
		for(int j : yes) {
			int l = filtered[j + u[i - 1] - u[i] + 1] - 1, r = filtered[j];
			g[r] = std::min(g[r], f[l] + st[r] - st[l]);
		}
		std::swap(f, g);
		for(int j = 1; j <= n; j++)
			if(!has[a[j]] || br[j] + 1 == u[i])
				f[j] = std::min(f[j], f[j - 1] + t[j]);
	}
	for(int j = 1; j <= n; j++)
		f[j] = std::min(f[j], f[j - 1] + t[j]);
	printf("%lld\n", f[n] < 0 ? f[n] + Inf : -1);
	return 0;
}