import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}


import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class RecycledNo {

    Scanner in;
    BufferedWriter out;

    RecycledNo(String input, String output) throws Exception {
        in = new Scanner(new File(input));
        FileWriter fstream = new FileWriter(output);
        out = new BufferedWriter(fstream);
    }

    private void solveAll() throws IOException {
        int T = in.nextInt();
        int A, B;

        for (int test = 1; test <= T; test++) {
            A = in.nextInt();
            B = in.nextInt();
            out.write("Case #" + test + ": " + solve(A, B));
            out.newLine();
        }

    }

    private int solve(int A, int B) {
        int count = 0, dig, pow10, lastPart, firstPart, exp10, newNo;
        int noDig = 1 + (int) Math.log10(A);
        Set<Integer> set = new HashSet<Integer>();

        for (int n = A; n < B; n++) {
            set.clear();
            pow10 = 1;
            lastPart = 0;
            firstPart = n;
            exp10 = (int) Math.pow(10, noDig - 1);
            
            for (dig = 1; dig < noDig; dig++) {
                lastPart = (firstPart % 10) * pow10 + lastPart;
                firstPart = firstPart / 10;
                pow10 *= 10;

                newNo = lastPart * exp10 + firstPart;
                exp10 /= 10;
                if ((int) Math.log10(newNo) != noDig - 1) {
                    continue;
                }

                if (newNo > n && newNo <= B &&
                        !set.contains(newNo)) {
                    set.add(newNo);
                    count++;
                }
            }
        }

        return count;
    }

    public void close() throws IOException {
        in.close();
        out.close();
    }

    public static void main(String[] args) throws Exception {
        RecycledNo pb = new RecycledNo("input.txt", "output.txt");

        pb.solveAll();

        pb.close();
    }
}
