import java.util.Arrays;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String answer = "";
        int counter = 1;
        while (true) {
            String inputNumbers = scan.nextLine();
            if (inputNumbers.equals("\n")) {
                break;
            }
            int ammoutLines = scan.nextInt();
            answer += String.format("Case %d", counter);
            for (int i = 0; i <= ammoutLines; i++) {
                int stringStart = scan.nextInt();
                int stringEnd = scan.nextInt();
                String subString = inputNumbers.substring(stringStart, stringEnd + 1);
                String[] subArray = subString.split("(?!^)");
                Set<String> subSet = new HashSet<>(Arrays.asList(subArray));
                if (subSet.size() == 1) {
                    answer += "Yes\n";
                } else {
                    answer += "No\n";
                }
            }
            counter += 1;
        }
        System.out.println(answer);
    }
}