package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.io.IOException;
import java.text.NumberFormat;
import java.util.List;

public class Welcome extends JamProblem {

    String welc = "welcome to code jam";

    public static void main(String[] args) throws IOException {
        Welcome p = new Welcome();
        p.go();
    }

    @Override
    String solveCase(JamCase jamCase) {
        WelcomeCase cas = (WelcomeCase) jamCase;
        int length = welc.length();
        int strL = cas.str.length();
        String str = cas.str;

        int[][] tab = new int[length][strL];
        for (int i = length - 1; i >= 0; i--) {
            char c = welc.charAt(i);
            for (int j = strL - 1; j >= 0; j--) {
                if (i == length - 1) {
                    if (j == strL - 1) {
                        tab[i][j] = str.charAt(j) == c ? 1 : 0;
                    } else {
                        tab[i][j] = mod(tab[i][j + 1] + (str.charAt(j) == c ? 1 : 0));
                    }
                } else {
                    if (j == strL - 1) {
                        tab[i][j] = 0;
                    } else {
                        tab[i][j] = mod(tab[i][j + 1] + (str.charAt(j) == c ? 1 : 0) * tab[i + 1][j]);
                    }
                }
            }
        }
        NumberFormat nf = NumberFormat.getInstance(); // Get Instance of NumberFormat
        nf.setMinimumIntegerDigits(4); // The minimum Digits required is 5
        nf.setMaximumIntegerDigits(4); // The maximum Digits required is 5
        nf.setGroupingUsed(false);
        return nf.format(tab[0][0]);  //To change body of implemented methods use File | Settings | File Templates.
    }

    @Override
    JamCase parseCase(List<String> file, int line) {
        WelcomeCase cas = new WelcomeCase();
        cas.lineCount = 1;
        cas.str = file.get(line);
        return cas;
    }

    int mod(int i) {
        return i % 10000;
    }
}

class WelcomeCase extends JamCase {
    String str;
}
