import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Main {

//	static int MAX = 10000;
	static int MAX = 2000000;
	static Object[] All = new Object[MAX+1];
	
	static int size( int x ) {
		if(x>999999) return 7;
		if(x>99999)  return 6;
		if(x>9999)   return 5;
		if(x>999)    return 4;
		if(x>99)     return 3;
		if(x>9)      return 2;
		return 1;
	}
	static int[] rotate( int value ) {
		List<Integer> result = new ArrayList<Integer>();
		int[] V = new int[8];
		int s = size(value);
		int x = value;
		
		for(int i=s-1;i>=0;i--) {
			V[i] = x%10;
			x /=10;
		}
		int rot;
		for(int i=1; i<s; i++) {
			if(V[i]!=0){
				rot=0;
				for(int j=0,ii=i;j<s; j++,ii=(ii+1)%s){
					rot=rot*10+V[ii];
				}
				if(rot>value && !result.contains(rot))
					result.add(rot);
			}
		}
		if( result.isEmpty() )
			return null;
		int[] r = new int[result.size()];
		for(int i=0; i<r.length; i++)
			r[i]=result.get(i);
		return r;
	}
	
	static void precalculate() {
		for(int i=1; i<=MAX; i++){
			All[i] = rotate(i);
		}
	}
	static int solve( Scanner in ) {
		int A, B, sol=0;
		
		A = in.nextInt();
		B = in.nextInt();

		for( int i=A; i<=B; i++) {
//			List<Integer> result = rotate(i);
			if( All[i]!=null ) {
				for(int value: (int[])All[i] ) {
					if( value <= B )
						sol++;
				}
			}
		}

		return sol;
	}
	
	public static void main ( String args[] ) {
		int T; 
		Scanner in = new Scanner(System.in);
		T = in.nextInt();
		int cnt=0;
		int sol;
		precalculate();
		for( cnt=1; cnt<=T; cnt++ ) {
			sol = solve( in );
			System.out.printf("Case #%d: %d\n", cnt, sol);
		}

	}
}

import java.util.*;

public class C {
	public static void main (String [] args) {
				
		Scanner s = new Scanner(System.in);
		int T = s.nextInt();
		int[] old = new int[7];
        
        
		for (int t = 1; t <= T; t++) {
			int A = s.nextInt();
            int B = s.nextInt();
			int ans = 0;
            
            for (int n = A; n < B; n++) {
                int time = 0;
                int d = 10;
                while (n >= d) {
                    time++;
                    d *= 10;
                }
                
                int oldSize = 0;
                for (int i = 0; i < time; i++) {
                    int m = movingFront(n, i, time - i);                    
                    if (m > n && m <= B) {
                        boolean unique = true;
                        for (int k = 0; k < oldSize; k++) {
                            if (old[k] == m) {
                                unique = false;
                                break;
                            }
                        }
                        if (unique) {
                            ans++;
                            old[oldSize++] = m;
                        }
                    }
                    
                }
            }
            
			System.out.println("Case #" + t + ": "+ans);
		}
	}
    
    public static int movingFront(int n, int index, int postMult) {
        int front = 0;
        int mult = 1;
        while (index-- >= 0) {
            front += ((n % 10) * mult);
            n /= 10;
            mult *= 10;
        }
        int frontMult = 1;
        while (postMult-- > 0) {
            frontMult *= 10;
        }
        return (front * frontMult) + n;
    }
}