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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 *
 * @author Donato
 */
public class IlyaAndQueries {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        char[] arreglo=br.readLine().toCharArray();
        int m=Integer.parseInt(br.readLine());
        int[] respuesta=new int[arreglo.length];
        for(int i=1;i<arreglo.length;i++){
            if(arreglo[i-1]==arreglo[i]){
                respuesta[i]=respuesta[i-1]+1;
            }
            else{
                respuesta[i]=respuesta[i-1];
            }
        }
        for(int i=0;i<m;i++){
            String[] entrada=br.readLine().split(" ");
            int l=Integer.parseInt(entrada[0]);
            int r=Integer.parseInt(entrada[1]);
            System.out.println(respuesta[r-1]-respuesta[l-1]);
        }
    }
    
}