package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.io.File;
import java.lang.StringBuilder;
import java.util.Scanner;
import java.io.FileWriter;

public class RN {
	
	public static void main(String[] args) throws Exception{
		File input = new File("C-small-attempt1.in");
		File output = new File("output.out");
		FileWriter fw = new FileWriter(output);
		Scanner s = new Scanner(input);
		
		int numloops = s.nextInt();
		StringBuilder sb = new StringBuilder();
		
		for(int n=0; n<numloops; n++){
			sb.append("Case #" + (n+1) + ": ");
			
			int low = s.nextInt();
			int hi = s.nextInt();
			int numrepeats = 0;
			
			for(int i=low; i<hi; i++){
				String strnum = "" + i;
				//System.out.println(strnum);
				
				for(int j=1; j<strnum.length(); j++){
					String rotstr = strnum.substring(j) + strnum.substring(0,j);
					//System.out.println(rotstr);
					int rotval = Integer.parseInt(rotstr);
					rotstr = "" + rotval;
					
					if(rotval > i && rotval <= hi ){//&& rotstr.length() == strnum.length()){
						numrepeats++;
						//System.out.println(strnum + " " + rotstr);
					}
					
					if(rotval == i)
						;//break; //already had a repeating number
				}
			}
			sb.append(numrepeats + "\n");
			//fw.append(numrepeats + "\n");
		}
		fw.write(sb.toString());
		fw.close();
	}
}
