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;

public class Solution {

    public static void main(String[] args)throws IOException {
        BufferedReader sc = new BufferedReader(new InputStreamReader(System.in));
        String s = sc.readLine();
        int[] dp = new int[s.length() + 1];
        for (int i = 1; i < s.length(); i++)
            if (s.charAt(i) == s.charAt(i - 1)) dp[i] = dp[i - 1] + 1;
            else dp[i] = dp[i - 1];
        int q = Integer.parseInt(sc.readLine());
        while (q-- > 0) {
            String[] st = sc.readLine().trim().split(" ");
            int l = Integer.parseInt(st[0]), r = Integer.parseInt(st[1]);
            System.out.println(dp[r - 1] - dp[l - 1]);
        }
    }
}