import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.io.PrintWriter;

public class C {
	InputScanner s = new InputScanner(System.in);
	PrintWriter out = new PrintWriter(System.out);

	
	
	public static void main(String[] args) {
		C program = new C();
		program.begin();
	}

	int prev;
	int current;
	
	int ansA;
	int ansB;
	
	int A;
	int B;
	
	public void begin() {
		int T = s.nextInt();
		
		for(int t=1;t<=T;t++) {
			A = s.nextInt();
			B = s.nextInt();
			prev = 0;
			for(int i=A-1;i<=B;i++) {
			current =prev+recycleCount(i);
			prev = current;
			//system.out.println(i+" CURRENT: "+current);
			if(i == A-1) ansA = current;
			}
			
			out.printf("Case #%d: %d\n",t,current-ansA);
		}
		out.close();
	}

	public int recycleCount(int x) {
		////system.out.println("-----");
		ArrayList<String> store = new ArrayList<String>();
		//system.out.print(x+" => ");
		int count = 0;
		String num = x+"";
		
		int a = 0;
		int b = 0;
		for(int i=1;i<num.length();i++) {
			String temp ="";
			for(int j=i,k=0;temp.length()<num.length();j=(j+1)%num.length(),k++) {
				////system.out.println(j);
				temp+=num.charAt(j);
				/*if(num.charAt(j)!='0') {
					b = k;
					if(a==0)
					a = k;
				}*/
				
			}
			/*//system.out.println(a+" "+b);
			temp = temp.substring(a, b+1);*/
			int val = Integer.parseInt(temp);
			
			if(val < x && (val+"").length() == num.length() && val >= A && !store.contains(val+"")) {
				count++;
				store.add(val+"");
				//system.out.print(" "+val);
				//system.out.print("*");
			}
		}
		//system.out.println();
		//system.out.println(count+"c");
		////system.out.println("-----");
		return count;
		
		
	}
	
	class InputScanner {
		BufferedReader br;
		StringTokenizer strtok = null;

		public InputScanner(InputStream stream) {
			br = new BufferedReader(new InputStreamReader(stream));

		}

		public InputScanner(File file) throws FileNotFoundException {
			br = new BufferedReader(new FileReader(file));
		}

		public String next() {
			if (strtok == null || !strtok.hasMoreTokens()) {
				try {
					strtok = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					throw new RuntimeException(e);
				}
			}
			return strtok.nextToken();
		}

		public int nextInt() {
			int i;
			try {
				i = Integer.parseInt(next());
			} catch (NumberFormatException e) {
				throw new RuntimeException(e);
			}
			return i;
		}

		public String nextLine() {
			if (strtok == null || !strtok.hasMoreTokens()) {
				try {
					strtok = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					throw new RuntimeException(e);
				}
			}
			return strtok.nextToken("\n").trim();
		}

	}

}