#include <bits/stdc++.h>
#define ll long long
using namespace std;
int mod=1e9+7;
int main()
{
ios::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
string s;
cin>>s;
string x=s;
reverse(x.begin(),x.end());
ll n=s.size();
vector<vector<ll>>pre(n,vector<ll>(4,0));
for(int i=0; i<n; i++)
{
for(int j=0; j<4; j++)
{
if(i)pre[i][j]=pre[i-1][j];
}
pre[i][i%4]+=(x[i]=='1');
}
int t;
cin>>t;
while(t--)
{
int l,r;
ll sum=0;
cin>>l>>r;
l--,r--;
if(r-l+1<=10)
{
for(ll i=r,x=1; i>=l; i--)
{
sum+=(s[i]=='1')*x;
x*=2;
}
cout<<sum%10<<endl;
}
else
{
r=n-r-1,l=n-l-1;
vector<ll>a(4,0),b{2,4,8,6};
for(int j=0; j<4; j++)
{
if(!l)a[j]=pre[r][r%4];
else a[j]=pre[r][r%4]-pre[(l+j+1)%4][(l+j+1)%4];
}
a[0]-=(s[r]=='1');
for(int i=0;i<4;i++){
sum+=b[i]*a[i];
}
sum+=(s[r]=='1');
sum%=10;
cout<<sum<<endl;
}
}
return 0;
}
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