#include <iostream>

using namespace std;

typedef unsigned long long ULL;

const int N = 100010, P = 131;

int n, m;
int p[N], h[N];
char str[N];

ULL get(int l, int r)
{
    return h[r] - h[l - 1] * p[r - l + 1];
}

int main()
{
    cin >> n >> m >> 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 (m--)
    {
        int l1, r1, l2, r2;
        scanf("%d%d%d%d", &l1, &r1, &l2, &r2);

        if (get(l1, r1) == get(l2, r2)) puts("Yes");
        else puts("No");
    }

    return 0;
}