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.util.ArrayList;


public class SpeakingInToungues {
private static String inputFile = "C:\\PERSONAL-WORKSPACE\\GCJ-2012\\src\\input-output\\Input.txt";
private static String outputFile = "C:\\PERSONAL-WORKSPACE\\GCJ-2012\\src\\input-output\\Output.txt";
public static void main(String[] args) {
	InputReader ir = new InputReader(inputFile);
	OutputWriter ow = new OutputWriter(outputFile);
	ArrayList<String> lines = ir.loadLines();
	//Given examples cover 25 chars and the one left out is q which is ideally mapped to the unused char z.
	String normalText = 	"aozq our language is impossible to understand there are twenty six factorial possibilities so it is okay if you want to just give up";
	String googlereseText = "yeqz ejp mysljylc kd kxveddknmc re jsicpdrysi rbcpc ypc rtcsra dkh wyfrepkym veddknkmkrkcd de kr kd eoya kw aej tysr re ujdr lkgc jv";
	StringBuffer sb = null;
	for(int i=1;i<lines.size();i++){
		sb = new StringBuffer();
		char[] charArray = lines.get(i).toCharArray();
		for(int j=0;j<charArray.length;j++){
			sb.append(normalText.charAt(googlereseText.indexOf(charArray[j])));
		}
		ow.writeCaseLine(sb.toString());
	}
	ow.flushAndClose();
}
}
