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.*;
import java.util.*;

public class Code {
	public static void main(String[] args) throws IOException {
		Scanner s = new Scanner(System.in);
		String str = s.next();
		int m = s.nextInt();
		int l = str.length();
		int dp[] = new int[l];
		for(int i = 1; i < l; i++) {
			if(str.charAt(i) == str.charAt(i - 1)) {
				dp[i] += dp[i - 1] + 1;
			}
			else dp[i] = dp[i - 1];
		}
		StringBuffer sb = new StringBuffer();
		for(int i = 0; i < m; i++) {
			int le = s.nextInt();
			int r = s.nextInt();
			sb.append((dp[r - 1] - dp[le - 1]) + "\n");
		}
		System.out.println(sb);
	}

	

}