import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

/**
 * @(#)Main.java
 *
 *
 * @author 
 * @version 1.00 2012/4/14
 */
import java.io.*;

public class Main {
	
	public static void main(String...args)throws IOException {
		BufferedReader br = new BufferedReader(new FileReader("C-large.in"));
        FileWriter fstream = new FileWriter("C-large.out");
        BufferedWriter out = new BufferedWriter(fstream);
        String in = br.readLine();
        int testCases = Integer.parseInt(in);
        int i = 1;
        
        while(testCases > 0) {
        	in = br.readLine();
        	out.write("Case #" + i + ": " + solve(in) + "\n");
        	testCases--;
        	i++;
        }
        out.close();
	}
	
	public static int solve(String in) {
		String[] data = in.split(" ");
		int a = Integer.parseInt(data[0]);
		int b = Integer.parseInt(data[1]);
		
		int solution = 0;
		
		for(int i = a; i < b; i++) {
			int tmp = i;
			
			do{
				tmp = shift(tmp);
				while (Math.floor(Math.log10(i)) != Math.floor(Math.log10(tmp))){
					tmp *= 10;
				}
				if(tmp > i && tmp <= b){
					solution++;
				}
			}while(tmp != i);
		}
		return solution;
	}
	
	public static int shift(int a){
		int E = firstDigit(a);
		int T = 10 * trailing(a);
		return E + T;
	}
	
	public static int trailing(int x) {
		if (x == 0) return 0;
		return (int) Math.floor(x % Math.pow(10, Math.floor(Math.log10(x))));
	}
	
	public static int firstDigit(int x) {
  		if (x == 0) return 0;
  		return (int) Math.floor(x / Math.pow(10, Math.floor(Math.log10(x))));
	}
    
}