import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}

public class Recycled {
	JamInputReader ir;	
	
	public Recycled(String fileName) {
		ir = new JamInputReader(fileName);
		int t = ir.getNumItems();
		
		for(int i = 0; i < t; i++) {
			System.out.println("Case #" + (i + 1) + ": " + proc(ir.getNextItem(), ir.getNextItem()));
		}
	}
	
	int proc(String A, String B) {
		int r = 0;
		int a, b, d;
		
		a = Integer.parseInt(A);
		b = Integer.parseInt(B);
		d = A.length();

		for(int i = a; i <= b; i++) {
			r += checkRecycleList(a, b, d, i);
		}
		return r;
	}

	boolean nodup(int[]l, int c, int m) {
		for(int i = 0; i< c; i++)
			if(l[i] == m)
				return false;
		
		return true;
	}
	
	int checkRecycleList(int a, int b, int d, int m) {
		int[] l = new int[d];
		int c = 0;
		int n = m;
		int d10 = (int)Math.pow(10, d - 1);
	
		for(int i = 0; i < d - 1 ; i++) {
			int temp = m % 10;
			m = m / 10 + (temp * d10);

			if(m >= a && m <= b && n < m && nodup(l, c, m)) {
				l[c] = m;
				c++;
			}
		}
	
		return c;
	}



	public static void main(String[] args) {
		new Recycled(args[0]);
	}
}
