import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

import java.io.*;
import java.util.*;

public class C
{
	public static void main(String[] args) throws Exception
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int numCases = Integer.parseInt(br.readLine());
		
		for(int i = 0; i < numCases; i++) {
			solveCase(i+1, br.readLine());
		}
	}
	
	private static void solveCase(int caseNum, String line) {
		String[] parts = line.split(" ");
	
		int start = Integer.parseInt(parts[0]);
		int end = Integer.parseInt(parts[1]);
		
		System.out.println("Case #"+caseNum+": "+solve(start, end));
	}
	
	private static int solve(int start, int end) {
		
		int res = 0;
		for(int i = start; i <= end; i++) {
			HashSet<Integer> encountered = new HashSet<Integer>();
			
			String asString = ""+i;
			for(int index = 1; index < asString.length(); index++) {
				char letter = asString.charAt(index);
				if(letter == '0') {
					//System.out.println(i+": skip index "+index);
					continue; // cant have leading 0
				}
				int switched = Integer.parseInt(asString.substring(index)+asString.substring(0, index));
				if(switched > i && switched >= start && switched <= end) {
					//encountered.add(i);
					
					if(encountered.contains(switched)){
						//System.out.println("already had "+switched);
						continue;
					}
					encountered.add(switched);
					res++;
					//System.out.println(i+": "+switched);
				} else {
					//System.out.println(i+": "+switched+" doesnt work");
				}
			}
		}
		return res;
	}
}