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.*;

public class Main2
{
	public static void main(String[] args) throws IOException
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine(); 
		int len = str.length()-1, n = Integer.parseInt(br.readLine());
		int[] matches = new int[len], range = new int[len];
		matches[0] = str.charAt(0) == str.charAt(1) ? 1 : 0; range[0] = matches[0];
		for(int i = 1; i < len; i++)
		{
			matches[i] = str.charAt(i) == str.charAt(i+1) ? 1 : 0;
			range[i] = range[i-1] + matches[i];
		}
		PrintWriter pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
		for(int i = 1; i <= n; i++)
		{
			String[] lr = br.readLine().split(" ");
			int l = Integer.parseInt(lr[0]), r = Integer.parseInt(lr[1]);
			pw.println(l == 1 ? range[r-2] : range[r-2] - range[l-2]);
		}
		br.close();
		pw.close();
	}
}