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.util.Scanner;

public class RecycleNum {
	static int digit(int x){
		int d = 0;
		while( x>0 ){
			d++;
			x /= 10;
		}
		return d;
	}
	static int power(int x){
		int n = 1;
		while(x>0){
			n *= 10;
			x--;
		}
		return n;
	}
	static int cirNum(int n, int m){
		int d = digit(n);
		n = (n%power(d-m))*power(m) + (n/power(d-m));
		return n;
	}
	static int result(int A, int B){
		int d = digit(A);
		int count = 0;
		for(int i = A; i <= B; i++){
			int[] key = new int[d-1];
			for(int j = 1; j < d; j++){
				key[j-1] = cirNum(i, j);
				for(int k = 0; k < j-1; k++){
					if( key[j-1] == key[k] ){
						if( key[j-1] != i && key[j-1] >= A && key[j-1] <= B )
							count--;
					}
						
				}
				if( key[j-1] != i && key[j-1] >= A && key[j-1] <= B ){
					count++;		
				}
			}
		}
		return count/2;
		
	}
	
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		int T = stdIn.nextInt();  // the number of test cases
		String[] str = new String[T+1];
		String[][] data = new String[T][2];
		for(int i = 0; i < T+1; i++){
			str[i] = stdIn.nextLine();
		}
		for(int i = 0; i < T; i++){
			data[i] = str[i+1].split(" ", 2);
		}
		
		int[] A = new int[T];
		int[] B = new int[T];
		for(int i = 0; i < T; i++){
			A[i] = Integer.parseInt(data[i][0]);
			B[i] = Integer.parseInt(data[i][1]);
		}
		
		for(int i = 0; i < T; i++){
			System.out.println("Case #" + (i+1) + ": " + result(A[i], B[i]));
		}
	}

}
