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:
//https://codeforces.com/problemset/problem/313/B
//B. Ilya and Queries
import java.util.*;
import java.io.*;
public class CF_313_B{
	public static void main(String[] args) throws Exception{
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(new OutputStreamWriter(System.out));
		StringBuilder sb = new StringBuilder();
		StringTokenizer st;

		String s = br.readLine();

		int count[] = new int[s.length()+1];
		for(int i=1;i<s.length();i++){
			count[i+1] = count[i];
			if(s.charAt(i)==s.charAt(i-1))
				count[i+1]++;
		}

		int n = Integer.parseInt(br.readLine());
		for(int i=0;i<n;i++){
			st = new StringTokenizer(br.readLine().trim());
			int l = Integer.parseInt(st.nextToken());
			int r = Integer.parseInt(st.nextToken());

			sb.append(count[r]-count[l]).append("\n");
		}
		
		pw.print(sb);
		pw.flush();
		pw.close();
	}
}