Problem: Ilya the Lion wants to help all his friends with passing exams. They need to solve the following problem to pass the IT exam.

You've got string s = s1s2... sn (n is the length of the string), consisting only of characters "." and "#" and m queries. Each query is described by a pair of integers li, ri (1 ≤ li < ri ≤ n). The answer to the query li, ri is the number of such integers i (li ≤ i < ri), that si = si + 1.

Ilya the Lion wants to help his friends but is there anyone to help him? Help Ilya, solve the problem.

Input

The first line contains string s of length n (2 ≤ n ≤ 105). It is guaranteed that the given string only consists of characters "." and "#".

The next line contains integer m (1 ≤ m ≤ 105) — the number of queries. Each of the next m lines contains the description of the corresponding query. The i-th line contains integers li, ri (1 ≤ li < ri ≤ n).

Output

Print m integers — the answers to the queries in the order in which they are given in the input.

Examples

Input

......
4
3 4
2 3
1 6
2 6


Output

1
1
5
4


Input

#..###
5
1 3
5 6
1 5
3 6
3 4


Output

1
1
2
2
0

Solution (in JAVA):

Solution:
import java.util.*;
import java.lang.*;

public class b313 {
    
    private static void solveProblem(){
        Scanner scan = new Scanner(System.in);
        
        String str = " "+scan.next();
        
        int n = str.length();
        
        char[] chars = str.toCharArray();
        //System.out.print(chars.length);
        
        int[] mat = new int[n+1];
        mat[0] = 0;
        mat[1] = 0;
        
        for(int i = 2; i < n; i++){
            mat[i] = mat[i-1];
            //System.out.println(i);
            if(chars[i-1] == chars[i]) 
                mat[i] += 1;
        }
        
        int m = scan.nextInt();
        
        StringBuffer answer = new StringBuffer();
        
        for(int i = 0; i<m; i++){
            answer.append(-mat[scan.nextInt()] + mat[scan.nextInt()] + "\n");
        }
        
        System.out.println(answer);
        return ;
    }

    
    public static void main(String[] args) {
        solveProblem(); 
    }
}