#include <iostream>
#include <cstdio>
using namespace std;
const int N = 1E5 + 10, P = 131;
typedef unsigned long long ull;
ull h[N], p[N];
char str[N];
ull get_hash(int l, int r){
    return h[r] - h[l - 1] * p[r - l + 1];
}
int main(){
    int n, q;   scanf("%d%d%s", &n, &q, str + 1);
    p[0] = 1;
    for(int i = 1; i <= n; i ++ ){
        p[i] = p[i - 1] * P;
        h[i] = h[i - 1] * P + str[i];
    }
    while(q -- ){
        int l1, r1, l2, r2; scanf("%d%d%d%d", &l1, &r1, &l2, &r2);
        cout << (get_hash(l1, r1) == get_hash(l2, r2) ? "Yes" : "No") << endl;
    }
    return 0;
}