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.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.StreamTokenizer;
import java.util.Scanner;


public class B {
	static StreamTokenizer st;
	static PrintWriter out;
	public static void main(String[] args) throws IOException {
		BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
		out = new PrintWriter(new OutputStreamWriter(System.out));
		char []a = bf.readLine().trim().toCharArray();
		int []cnt = new int [a.length+1];
		for (int i = 1; i < a.length; i++) {
			if (a[i] == a[i-1]) cnt[i] +=cnt[i-1]+1; 
			else cnt[i] = cnt[i-1];
		}
//		for (int i = 0; i < cnt.length; i++) {
//			System.out.println(cnt[i]);
//		}
		int n = Integer.parseInt(bf.readLine());
		String []s;
		int l,r;
		for (int i = 0; i < n; i++) {
			s = bf.readLine().split(" ");
			l = Integer.parseInt(s[0]);
			r = Integer.parseInt(s[1])-1;
			out.println(cnt[r]-cnt[l-1]);
		}
		out.close();
	}
}