#include <bits/stdc++.h>

using namespace std;
#define endl '\n'
#define sz(x) (int)x.size()

void setFile() {
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
}

const int N = 2e5 + 10;

string s;
int n, q, sum[N], p[] = {2, 4, 8, 6};

int main() {
    setFile();
    cin >> s;
    n = sz(s);
    for (int i = 0; i < n; i++) {
        sum[i] = s[i] == '1';
        if (i >= 4)
            sum[i] += sum[i - 4];
        if (sum[i] >= 10)
            sum[i] -= 10;
    }
    cin >> q;
    while (q--) {
        int l, r;
        cin >> l >> r;
        l--;
        r--;
        int ans = s[r--] == '1';
        for (int i = 0, j; r >= l && i < 4; i++, r--) {
            ans += sum[r] * p[i];
            j = r - (r - l) / 4 * 4 - 4;
            if (j >= 0)
                ans -= sum[j] * p[i];
        }
        cout << (ans % 10 + 10) % 10 << endl;
    }
}