import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t=sc.nextInt();
		int casos=1, a, b, n, m, cont;
		while(t!=0){
			a=sc.nextInt();
			b=sc.nextInt();
			if(a>b){
				int aux=a;
				a=b;
				b=aux;
			}
			System.out.printf("Case #%d: ",casos++);
			if(a==b){
				System.out.printf("%d\n",0);
			}else{
				cont=0;
				for(n=a;n<b;n++){					
					for(m=n+1;m<=b;m++){					
						if(isRecycled(n,m)) cont++;
					}
				}
				System.out.printf("%d\n",cont);
			}
			t--;
		}		
	}
	public static boolean isRecycled(int n1, int n2){
		String s1, s2, aux;
		s1 =  String.valueOf( n1 );
		s2 =  String.valueOf( n2 );		
		boolean r = false;		
		for(int i=0;i<s1.length();i++){
			aux="";
			aux=s1.substring(i,s1.length())+s1.substring(0,i);
//			System.out.println(aux);
			if(aux.equals(s2)){
				r=true;
				break;
			}
		}		
		return r;
	}
}


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class RecycledNumber {

    private int numCase;

    public void calc() throws FileNotFoundException, IOException {

        FileReader reader = new FileReader("D:/C-small-attempt0.in");
        BufferedReader bf = new BufferedReader(reader);

        FileWriter writer = new FileWriter("D:/output.txt");
        BufferedWriter bw = new BufferedWriter(writer);

        numCase = Integer.parseInt(bf.readLine());
        int n, m;
        for (int all = 1; all <= numCase; all++) {
            String[] inp = bf.readLine().split(" ");
            n = Integer.parseInt(inp[0]);
            m = Integer.parseInt(inp[1]);
            int count = 0;
            if (n < 10) {
                count = 0;
            } else if (n < 100) {
                for (int i = n; i <= m; i++) {
                    String temp = i + "";
                    String rv = temp.charAt(1) + "" + temp.charAt(0);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                }
            } else if (n >= 100 && n <= 999) {
                for (int i = n; i <= m; i++) {
                    String temp = i + "";
                    String rv = temp.charAt(2) + "" + temp.charAt(0) + "" + temp.charAt(1);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                    rv = temp.charAt(1) + "" + temp.charAt(2) + "" + temp.charAt(0);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                }
            } else if (n >= 1000 & n <= 9999) {
                for (int i = n; i <= m; i++) {
                    String temp = i + "";
                    String rv = temp.charAt(1) + "" + temp.charAt(2) + "" + temp.charAt(3) + "" + temp.charAt(0);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                    rv = temp.charAt(2) + "" + temp.charAt(3) + "" + temp.charAt(0) + "" + temp.charAt(1);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                    rv = temp.charAt(3) + "" + temp.charAt(0) + "" + temp.charAt(1) + "" + temp.charAt(2);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                }
            }
            System.out.println("Case #" + all + ": " + count / 2);
            bw.write("Case #" + all + ": " + count / 2+"\r\n");
        }
        bw.close();
        writer.close();
        bf.close();
        reader.close();
    }

    public static void main(String[] args) throws FileNotFoundException, IOException {
        RecycledNumber rn = new RecycledNumber();
        rn.calc();
    }
}