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.io.*;

public class C {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		int[] arr = new int[str.length()];
		int n = sc.nextInt();

		arr[0] = 0;
		for(int i=1; i<arr.length; i++){
			if(str.charAt(i) == str.charAt(i-1))
				arr[i] += (arr[i-1]+1);
			else
				arr[i] += arr[i-1];
		}

		int[] ans = new int[n];
		for(int i=0; i<n; i++){
			int first = sc.nextInt()-1;
			int second = sc.nextInt()-1;
			ans[i] = arr[second] - arr[first];
		}

		for(int i=0; i<n; i++){
			System.out.println(ans[i]);
		}
	}
}