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;
import java.util.Scanner;

public class Queries {
	public static void main(String[] args) throws IOException {
		BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
		String line=in.readLine();
		int n=Integer.parseInt(in.readLine());
		int l=line.length();
		int[] arr=new int[l];
		int k =0;
		for (int i = 1; i < l; i++) {
//			if(line.charAt(i)==line.charAt(i-1)) k++;
//			arr[i]=k;
			arr[i]=line.charAt(i)==line.charAt(i-1)?arr[i-1]+1:arr[i-1];
		}
		for (int i = 0; i < n; i++) {
			String s=in.readLine();
			int a=Integer.parseInt(s.substring(0, s.indexOf(" ")))-1;
			int b=Integer.parseInt(s.substring(s.indexOf(" ")+1))-1;
			System.out.println(a==0?arr[b]:arr[b]-arr[a]);
		}
	}
}