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.util.*;

public class Recycled {
	public static void main(String[] args) {
		
		Scanner p = new Scanner(System.in);
		int tests = p.nextInt();
		
		for(int i = 0; i<tests; i++) {
			int count = 0;
			boolean[] used = new boolean [1001];
			Integer a = p.nextInt();
			Integer b = p.nextInt();
			if( b == 1000 ) {
				b = 999;
			}
			for( ; a<b; a++) {
				if( a < 10 ) {
					a = 10;
				}
				char[] start = ((a.toString()).toCharArray() );
				if(a <= 99) {
					char temp0 = start[0];
					char temp1 = start[1];
					
					start[1] = temp0;
					start[0] = temp1;
					int number1 = Integer.parseInt(new String(start));
					if(number1 <= b && number1 >= a && !used[number1] && number1 != a) {
						used[a] = true;
						count++;
					}
				}
								
				else if(a >= 100) {
					char temp0 = start[0];
					char temp1 = start[1];
					char temp2 = start[2];
					//one rotation
					start[2] = temp1;
					start[1] = temp0;
					start[0] = temp2;
					int number1 = Integer.parseInt(new String(start));
					if(number1 <= b && number1 >= a && !used[number1] && number1 != a) {
						used[a] = true;
						count++;
					}
				
					start[2] = temp0;
					start[1] = temp2;
					start[0] = temp1;
					int number2 = Integer.parseInt(new String(start));
					if(number2 <= b && number2 >= a && !used[number2] && number1 != number2 && number2 != a) {
						used[a] = true;
						count++;
					}
				}
			}
			System.out.println("Case #" + (i+1) + ": " + count);
		}
	}
}

