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.*;
import java.math.*;

public class C{

	public static int func(int x, int M){
		int tmp,d=0,i;
		
		int a[] = new int[10];
		d = 0;
		tmp = x;
		while(tmp > 0){
			a[d] = tmp % 10;
			tmp /= 10;
			d++;
		}
		
		int ten = 1;
		for(i=0;i<d-1;i++) ten *= 10;
		
		int y[] = new int[d];
		tmp = x;
		for(i=0;i<d;i++){
			y[i] = tmp;
			tmp = tmp / 10 + ten * a[i];
		}
		
		Arrays.sort(y);
		
		int ans = 0;
		for(i=0;i<d;i++) if(y[i] > x && y[i] <= M && (i == 0 || y[i] != y[i-1])) ans++;
		return ans;
	}

	public static void main(String args[]){
		int T,t,A,B,i;
		
		Scanner scan = new Scanner(System.in);
		
		T = scan.nextInt();
		
		for(t=0;t<T;t++){
			A = scan.nextInt();
			B = scan.nextInt();
			
			int ans = 0;
			for(i=A;i<=B;i++) ans += func(i,B);
			
			System.out.printf("Case #%d: %d\n", t+1, ans);
		}
	}

}
