import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    	static String tocheck = "";

	static void initialize(String s) {
		tocheck = s;
	}

	static int answerQuery(int l, int r) {
		int numofPalin = 0;
		String newStr = tocheck.substring(l, r);
		numofPalin = findrepeater(newStr);
		return numofPalin;
		// Return the answer for this query modulo 1000000007.
	}

	static int findrepeater(String s) {
		int distinct = 0;
		for (int i = 0; i < s.length(); i++) {
			for (int j = 0; j < s.length(); j++) {
				if (s.charAt(i) == s.charAt(j)) {
					distinct++;
				}
			}
			//System.out.println(s.charAt(i) + "--" + distinct);
			String d = String.valueOf(s.charAt(i)).trim();
			s = s.replaceAll(d, "");
			//distinct = 0;
		}
		return distinct;
	}

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        initialize(s);
        int q = in.nextInt();
        for(int a0 = 0; a0 < q; a0++){
            int l = in.nextInt();
            int r = in.nextInt();
            int result = answerQuery(l, r);
            System.out.println(result);
        }
        in.close();
    }
}