#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#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<unordered_set>
#include<utility>
#include<cassert>
#include<complex>
#include<numeric>
#include<array>
#include<chrono>
using namespace std;

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

typedef unsigned long long ul;
typedef unsigned int ui;
//ll mod = 1;
constexpr ll mod = 998244353;
//constexpr ll mod = 1000000007;
const int mod17 = 1000000007;
const ll INF = (ll)mod17 * mod17;
typedef pair<int, int>P;

#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;

using ld = double;
typedef pair<ld, ld> LDP;
const ld eps = 1e-10;
const ld pi = acosl(-1.0);

template<typename T>
void chmin(T& a, T b) {
    a = min(a, b);
}
template<typename T>
void chmax(T& a, T b) {
    a = max(a, b);
}
template<typename T>
vector<T> vmerge(vector<T>& a, vector<T>& b) {
    vector<T> res;
    int ida = 0, idb = 0;
    while (ida < a.size() || idb < b.size()) {
        if (idb == b.size()) {
            res.push_back(a[ida]); ida++;
        }
        else if (ida == a.size()) {
            res.push_back(b[idb]); idb++;
        }
        else {
            if (a[ida] < b[idb]) {
                res.push_back(a[ida]); ida++;
            }
            else {
                res.push_back(b[idb]); idb++;
            }
        }
    }
    return res;
}
template<typename T>
void cinarray(vector<T>& v) {
    rep(i, v.size())cin >> v[i];
}
template<typename T>
void coutarray(vector<T>& v) {
    rep(i, v.size()) {
        if (i > 0)cout << " "; cout << v[i];
    }
    cout << "\n";
}
ll mod_pow(ll x, ll n, ll m = mod) {
    if (n < 0) {
        ll res = mod_pow(x, -n, m);
        return mod_pow(res, m - 2, m);
    }
    if (abs(x) >= m)x %= m;
    if (x < 0)x += m;
    //if (x == 0)return 0;
    ll res = 1;
    while (n) {
        if (n & 1)res = res * x % m;
        x = x * x % m; n >>= 1;
    }
    return res;
}
//mod should be <2^31
struct modint {
    int n;
    modint() :n(0) { ; }
    modint(ll m) {
        if (m < 0 || mod <= m) {
            m %= mod; if (m < 0)m += mod;
        }
        n = m;
    }
    operator int() { return n; }
};
bool operator==(modint a, modint b) { return a.n == b.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 -= (int)mod; return a; }
modint operator-=(modint& a, modint b) { a.n -= b.n; if (a.n < 0)a.n += (int)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)); }
modint operator/=(modint& a, modint b) { a = a / b; return a; }
const int max_n = 1 << 20;
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];
}
modint combP(int a, int b) {
    if (a < 0 || b < 0 || a < b)return 0;
    return fact[a] * factinv[a - b];
}

ll gcd(ll a, ll b) {
    a = abs(a); b = abs(b);
    if (a < b)swap(a, b);
    while (b) {
        ll r = a % b; a = b; b = r;
    }
    return a;
}
template<typename T>
void addv(vector<T>& v, int loc, T val) {
    if (loc >= v.size())v.resize(loc + 1, 0);
    v[loc] += val;
}
/*const int mn = 2000005;
bool isp[mn];
vector<int> ps;
void init() {
    fill(isp + 2, isp + mn, true);
    for (int i = 2; i < mn; i++) {
        if (!isp[i])continue;
        ps.push_back(i);
        for (int j = 2 * i; j < mn; j += i) {
            isp[j] = false;
        }
    }
}*/

//[,val)
template<typename T>
auto prev_itr(set<T>& st, T val) {
    auto res = st.lower_bound(val);
    if (res == st.begin())return st.end();
    res--; return res;
}

//[val,)
template<typename T>
auto next_itr(set<T>& st, T val) {
    auto res = st.lower_bound(val);
    return res;
}
using mP = pair<modint, modint>;
mP operator+(mP a, mP b) {
    return { a.first + b.first,a.second + b.second };
}
mP operator+=(mP& a, mP b) {
    a = a + b; return a;
}
mP operator-(mP a, mP b) {
    return { a.first - b.first,a.second - b.second };
}
mP operator-=(mP& a, mP b) {
    a = a - b; return a;
}
LP operator+(LP a, LP b) {
    return { a.first + b.first,a.second + b.second };
}
LP operator+=(LP& a, LP b) {
    a = a + b; return a;
}
LP operator-(LP a, LP b) {
    return { a.first - b.first,a.second - b.second };
}
LP operator-=(LP& a, LP b) {
    a = a - b; return a;
}

mt19937 mt(time(0));

const string drul = "DRUL";
string senw = "SENW";
//DRUL,or SENW
//int dx[4] = { 1,0,-1,0 };
//int dy[4] = { 0,1,0,-1 };

//------------------------------------
void mp_algo(const string& s, vector<int>& a) {
    int sz = s.size();
    a.resize(sz + 1); a[0] = -1;
    vector<int> memo(sz + 1); memo[0] = -1;
    int j = -1;
    rep(i, sz) {
        while (j >= 0 && s[i] != s[j])j = memo[j];
        j++;
        a[i + 1] = j;
        if (s[i + 1] == s[j])memo[i + 1] = memo[j];
        else memo[i + 1] = j;
    }
}
void Z_algorithm(const string& s, vector<int>& a) {
    int sz = s.size();
    a.resize(sz);
    a[0] = sz;
    int i = 1, j = 0;
    while (i < sz) {
        while (i + j < sz && s[j] == s[i + j])++j;
        a[i] = j;
        if (j == 0) { ++i; continue; }
        int k = 1;
        while (i + k < sz && k + a[k] < j)a[i + k] = a[k], ++k;
        i += k; j -= k;
    }
}

int par[18][1 << 18];
void solve() {
    int n, q; cin >> n >> q;
    string s; cin >> s;
    string t; cin >> t;
    vector<ll> w(n);
    rep(i, n)cin >> w[i];
    vector<ll> rw(n + 1);
    rep(i, n)rw[i + 1] = rw[i] + w[i];
    vector<int> ql(q), qr(q);
    rep(i, q) {
        cin >> ql[i] >> qr[i];
        ql[i]--;
    }
    string st = s + "!" + t;
    vector<int> vmp;
    mp_algo(st, vmp);
    //coutarray(vmp);
    vector<int> trans(n);
    rep(i, n) {
        int v = vmp[i + n + 2];
        trans[i] = v;
    }
    rep(i, n + 1)par[0][i] = vmp[i];
    rep(j, 17) {
        rep(i, n + 1) {
            if (par[j][i] < 0)par[j + 1][i] = -1;
            else par[j + 1][i] = par[j][par[j][i]];
        }
    }
    //coutarray(vmp);
    vector<ll> sum(n+1);
    rep(i, n + 1) {
        if (i > 0) {
            //cout << "? " << par[0][i] << "\n";
            sum[i] += w[i - 1];
            sum[i] += sum[par[0][i]];
        }
    }

    //coutarray(trans);

    vector<int> vz;
    Z_algorithm(st,vz);

    int cl = 0, cr = 0;
    ll val = 0;
    auto addr = [&]() {
        //add cr
        int v = trans[cr];
        int sup = cr - cl + 1;
        if (v >sup) {
            per(j, 18) {
                if (par[j][v] > sup)v = par[j][v];
            }
            v = par[0][v];
        }
        val += sum[v];
        cr++;
        //cout << cl << " " << cr << " " << val << "\n";
    };
    auto delr = [&]() {
        //ersae cr-1
        cr--;
        int v = trans[cr];
        int sup = cr - cl + 1;
        if (v > sup) {
            per(j, 18) {
                if (par[j][v] > sup)v = par[j][v];
            }
            v = par[0][v];
        }
        val -= sum[v];
    };
    auto addl = [&]() {
        //add cl-1
        cl--;
        int len = min(cr - cl, vz[cl + n + 1]);
        val += rw[len];
    };
    auto dell = [&]() {
        //erase cl
        int len = min(cr - cl, vz[cl + n + 1]);
        val -= rw[len];
        cl++;
    };

    const int bl = 400;
    int d = (n + bl - 1) / bl;
    vector<vector<P>> qs(d);
    rep(i, q) {
        qs[ql[i] / bl].push_back({ qr[i],i });
    }
    vector<ll> ans(q);
    rep(i, d) {
        if (i % 2 == 0) {
            sort(all(qs[i]));
        }
        else {
            sort(all(qs[i]), greater<P>());
        }
        for (auto p : qs[i]) {
            int id = p.second;
            while (cr < qr[id])addr();
            while (cl > ql[id])addl();
            while (cr > qr[id])delr();
            while (cl < ql[id])dell();
            ans[id] = val;
        }
    }
    rep(i, q)cout << ans[i] << "\n";
}



signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed<<setprecision(10);
    //init_f(); cout << comb(28, 7) << "\n";
    //init();
    //while(true)
    //expr();
    //int t; cin >> t; rep(i, t)
    solve();
    return 0;
}