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 Program
{
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		String str= s.next();
		int[] arr= new int[str.length()];
		if(str.charAt(0)==str.charAt(1)){
		    arr[0]=1;
		}
	    for(int i=1;i<str.length()-1;i++){
	        if(str.charAt(i)==str.charAt(i+1)){
	            arr[i]=arr[i-1]+1;
	            
	        }
	        else{
	           arr[i]=arr[i-1];
	        }
	    }
	    int m= s.nextInt();
	    for(int i=0;i<m;i++){
	        int l= s.nextInt();
	        int r= s.nextInt();
	        if(l==1){
	            System.out.println(arr[r-2]);
	        }
	        else
	            System.out.println(arr[r-2]-arr[l-2]);
	    }
	}
}