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.util.Scanner;

public class IlyaQueries {

	public static void main(String[] args) {

		Scanner in = new Scanner(System.in);

		String s = in.nextLine();

		int n = in.nextInt();

		int l, r;

		int tam = s.length();
		int a[] = new int[tam];
		a[0] = 0;
		for (int k = 1; k < tam; k++) {
			if (s.charAt(k) == s.charAt(k - 1)) {
				a[k] = a[k - 1] + 1;
			} else {
				a[k] = a[k - 1];
			}
		}

		for (int i = 0; i < n; i++) {
			l = in.nextInt();
			r = in.nextInt();

			System.out.println(a[r - 1] - a[l - 1]);
		}

		in.close();
		System.exit(0);

	}

}