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 Hello{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String str = sc.next();
        int[] dp = new int[str.length()];
        for(int i=1;i<str.length();i++){
            dp[i] = (str.charAt(i)==str.charAt(i-1))?dp[i-1]+1:dp[i-1];
        }
//        dp[str.length()-1] = dp[str.length()-2];
        int n = sc.nextInt();
        StringBuilder s = new StringBuilder();
        while(n-->0)
        {
            int a,b;
            a=sc.nextInt();
            b=sc.nextInt();
            int answer = dp[b-1] - dp[a-1];
            s.append(answer+"\n");
        }
        System.out.println(s);
    }
}