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 n313B {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        char[] chars = scanner.next().toCharArray();
        int[] dp = new int[chars.length];
        int last = chars[0];
        int continuous = 1;
        dp[0] = 0;
        for (int i = 1; i < chars.length; i++) {
            if (chars[i] == last)
                continuous++;
            else {
                last = chars[i];
                continuous = 1;
            }
            if (continuous > 1)
                dp[i] = dp[i - 1] + 1;
            else
                dp[i] = dp[i - 1];
        }
        int m = scanner.nextInt();
        int l, r;
        for (int i = 0; i < m; i++) {
            l = scanner.nextInt();
            r = scanner.nextInt();
            System.out.println(dp[r - 1] - dp[l - 1]);
        }
    }
}