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.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

public class ProblemC {

    public static int eval(int A, String n, int B){
        int r = 0;
        for(int i = 1; i < n.length(); i++){
            int nn = Integer.parseInt((n));
            String ini = n.substring(0, n.length() - i);
            String end = n.substring(n.length() - i);
            
            if(Integer.parseInt(String.valueOf(end.charAt(0))) >= Integer.parseInt(String.valueOf(ini.charAt(0)))){
                int m = Integer.parseInt((end+ini));
                if( A <= m && nn < m && m <= B  ){
                    r++;
                }
            }
            
        }
        return r;
    }
    
    public static void main(String[] args) throws IOException {
        Scanner s = new Scanner(System.in);
        PrintWriter pw = new PrintWriter(new FileWriter("C.out"));
        int cas = s.nextInt();
                
        for( int i = 0; i < cas; i++){
            int r = 0;
            int A = s.nextInt();
            int B = s.nextInt();
            
            for(int n = A; n <= B; n++){
                r += eval(A,String.valueOf(n),B);
            }
            //System.out.println("Case #"+(i+1)+": "+r);
            pw.println("Case #"+(i+1)+": "+r);
        }
        
        pw.close();
        s.close();
    }
}
