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();
    }
}

import java.io.*;
import java.lang.reflect.Array;
import java.math.*;

public class Qualifying_C {

	public static void main(String[] args) throws Exception {
        BufferedReader input = new BufferedReader(new FileReader(args[0]));
        int T = Integer.parseInt(input.readLine());
        
        for (int t = 1; t <= T; t++) {
        	String[] tokens = input.readLine().split(" ");
        	
        	int A = Integer.parseInt(tokens[0]);
        	int B = Integer.parseInt(tokens[1]);
        	
        	int r = 0;
        	
        	for (int n = A; n < B; n++){
        		int i, m;
        		int [] C = new int[6];
        		
        		for (i = 0; n / (int) Math.pow(10, i) != 0; i++);    			
        		
        		outer:
        		for (int j = 1; j < i; j++) {
        			m = (n % (int) Math.pow(10, j)) * (int) Math.pow(10, i - j) + n / (int) Math.pow(10, j);
        			
        			if (m > n && m <= B){
        				int c;
        				for (c = 0; c < C.length && C[c] != 0; c++)
        					if (C[c] == m)
        						break outer;
        					
        				r++;
        				C[c] = m;
        			}
        		}
        	}
        	
        	System.out.println("Case #" + t + ": " + r);
        }		
	}
}
