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.ArrayList;
import java.util.Arrays;
import java.util.HashMap;



public class Recycled extends TemplateClass {

	public Recycled() {
	}

	public Recycled(String nombreficheroEntrada, String nombreFicheroSalida) throws Exception {
		super(nombreficheroEntrada, nombreFicheroSalida);
	}
	
	protected void procesaTestCase() throws Exception {

		// Variables
		int testCase = 0;
		ArrayList lista = new ArrayList();
		long a;
		long b;
		long casos;
		
		for (testCase = 0; testCase < testCases; testCase++) {
			a = sc.nextInt();
			b = sc.nextInt();
			
			casos = numeroCasos(a,b);
			bw.write("Case #" + (testCase + 1) + ": " + casos + "\n");		
		} 
		bw.close();
	}
	
	private long numeroCasos(long a, long b){
		long casos = 0;
//		long medio = (long)(Math.ceil(((b - a)/2)) + a);
		char c[];
		long arrayCombinaciones[];
		long temp = 0;
		long base = 0;
		
		for(long i = a; i <= b; i++){
			base = i;
			c = (Long.toString(i)).toCharArray();
			//comprueba numero
//			for (int j = 0; j < c.length; j++) {
				arrayCombinaciones = traeCombinaciones(c);
				siguiente:
				for (int k = 0; k < arrayCombinaciones.length; k++) {
					temp = arrayCombinaciones[k];
					if (temp > base){
						base = temp;
					}else{
						continue siguiente;
					}
					if (temp <= b){
						casos += 1;
					}
				}
//			}
		}
		return casos;
	}
	
	private long[] traeCombinaciones(char c[]){
		long array[] = new long[c.length];
		char temp[] = c;
		char temp2[] = c;
		int k = 0;
		String s;
		s = String.valueOf(temp);
		array[0] = Long.parseLong(s);
		
		for (int i = 1; i < array.length; i++) {
			temp = new char[c.length];
			for (int j = 0; j < c.length; j++) {
				if (j == 0){
					k = c.length - 1;
				}else{
					k = j - 1;
				}
				temp[k] = temp2[j];
			}
			temp2 = temp;
			array[i] = Long.parseLong(String.valueOf(temp));
		}
		Arrays.sort(array);
		return array;
	}
}
