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();
    }
}

package recycled;
import java.io.*;
import java.util.StringTokenizer;
import java.util.HashSet;

class Par{
    long x;
    long y;
    Par(long a, long b){x=a;y=b;};
    @Override
    public int hashCode() {
        return (int) ((int) x+y);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Par other = (Par) obj;
        if (this.x != other.x) {
            return false;
        }
        if (this.y != other.y) {
            return false;
        }
        return true;
    }
}
class Solucionar{
    long buscar(String base, String techo){
        long ret = 0;
        HashSet<Par> cjto = new HashSet<Par>();
        
        if ((base.length() == techo.length())||(base.length()==1)){
            int tam = (int) Math.pow(10 , base.length() - 1);
            int veces = base.length() - 1;
            
            int inicio = Integer.parseInt(base);
            int fin =  Integer.parseInt(techo);
            
            for (int i=inicio;i<fin;i++){
                int original = i;
                int numero = i;
                
                for (int h=0;h<veces;h++){
                    int cabeza = numero / tam;
                    int cola = numero % tam;
                    numero = cabeza + cola*10;
                    if  (  (original >= inicio)
                           && ( numero > original)
                            && ( fin >= numero)
                         ) 
                    {   
                        Par ingresar =  new Par(original,numero);
                        if (! cjto.contains(ingresar))
                        {  //System.err.println(original + " + " + numero);
                           ret++;
                           cjto.add(ingresar);
                        }
                    }
                    
                }
                
            }
            
            
            
            //System.err.print(tam);
        }
        
        return ret;
    }
}
public class Recycled{
    public static void main(String[] args) throws Exception{
        Solucionar s = new Solucionar();
        //s.buscar("1000000", "2333444");
        //s.buscar("1111","2222");
        
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader (isr);
        
        String linea;
        linea = br.readLine();
        int casos = Integer.parseInt(linea);
        
        for (int i=0;i<casos;i++){
            linea = br.readLine();
            StringTokenizer tk = new StringTokenizer(linea);
            String base = tk.nextToken();
            String techo = tk.nextToken();
            long ret = s.buscar(base, techo);
            System.out.println("Case #"+ (i+1) + ": " + ret );
        }
        
    }
}
