uva 10324

#include<bits/stdc++.h>
using namespace std;
int main()
{

    char s[1000005];
    int k = 0,n;
    while(scanf("%s %d",s,&n)==2)
    {
        k++;
        printf("Case %d:\n",k);

        int a,b,i,j;

        for(i=0;i<n;i++)
        {
            cin>>a>>b;
            if(a>b)
            {
                a = a+b;
                b = a-b;
                a = a-b;
            }

            bool fg = false;

            for(j=a;j<b;j++)
            {
                if(s[j]!=s[j+1])
                {
                    fg = true;
                    break;
                }
            }
            if(fg == false) cout<<"Yes"<<endl;
            else cout<<"No"<<endl;

        }


    }

return 0;
}