#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
#include <unordered_map>
#include <map>
#define ll long long
#define endl '\n'
#define Pi 3.1415926535898
const int N = 2e6 + 5;
#define watch(x) cout << #x << " = " << x << endl;
#define all(v) (v).begin(),(v).end()
using namespace std;
// cout << fixed << setprecision(9);
void fast() {
std::ios_base::sync_with_stdio(0);
cin.tie(NULL);
cout.tie(NULL);
}
void file() {
#ifndef ONLINE_JUDGE
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);ح
#endif
}
int dx[] = { 0, 0, 1, -1, 1, -1, 1, -1 }; // dir array
int dy[] = { 1, -1, 0, 0, 1, -1, -1, 1 };

int main() {
fast();
file();
// cout << (1 << 5);
//bitset<32> bits("01110101");
// cout << bits.to_ulong() << endl;
string s;
cin >> s;
int sz = s.size();
vector <ll> v(sz + 1);
v[0] = 0;
for (int i = 0;i < sz;i++) {
if (s[i] == '0') {
v[i+1] = (v[i] * 2) % 10 ;
}
else {
v[i+1] = (((v[i] * 2) % 10) +1)% 10 ;
}
}
//for (auto it : v) cout << it << " ";
int q;
cin >> q;
while (q--) {
ll l, r;
cin >> l >> r;
if (l==1)
cout << v[r] << endl;
else {
ll dis = r - l + 1;
ll a=0;
if (dis%4==1) a=2;
else if (dis%4==2) a=4;
else if (dis%4==3) a=8;
else if (dis%4==0) a=6;
ll x = (v[l - 1] * a) %10;
cout <<abs( v[r] - x)%10 << endl;
}
}
return 0;
}