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 MyClass {

     public static void main(String[] args) {
     Scanner scan = new Scanner(System.in);
     String str = scan.next();
     int[] sum = new int[str.length()];
     sum[0] = 0;
     int count = 0;
     for(int i = 1; i < str.length(); i++)
     {
         if(str.charAt(i-1) == str.charAt(i))
         {
             count++;
         }
         sum[i] = count;
     }
     int n = scan.nextInt();
     int s;
     int f;
     
     for(int i = 0; i<n; i++)
     {
         s = scan.nextInt();
         f = scan.nextInt();
         System.out.println(sum[f-1] - sum[s-1]);         
     }
     
  }  
}