import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

   // static void initialize(String s) {

        // This function is called once before all queries.
  //  }

   // static int answerQuery(int l, int r) {
        // Return the answer for this query modulo 1000000007.
   // }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
       // initialize(s);
        int q = in.nextInt();
        for(int a0 = 0; a0 < q; a0++){
            int l = in.nextInt();
            int r = in.nextInt();
                    int result=0;
        int n=s.length();
   
            if((r-l)%2!=0){
                result=(r-l)/2+1;
            }
            else result=(r-l)/2;
            //int result = answerQuery(l, r);
            System.out.println(result);
        }
        in.close();
    }
}