import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Main {

//	static int MAX = 10000;
	static int MAX = 2000000;
	static Object[] All = new Object[MAX+1];
	
	static int size( int x ) {
		if(x>999999) return 7;
		if(x>99999)  return 6;
		if(x>9999)   return 5;
		if(x>999)    return 4;
		if(x>99)     return 3;
		if(x>9)      return 2;
		return 1;
	}
	static int[] rotate( int value ) {
		List<Integer> result = new ArrayList<Integer>();
		int[] V = new int[8];
		int s = size(value);
		int x = value;
		
		for(int i=s-1;i>=0;i--) {
			V[i] = x%10;
			x /=10;
		}
		int rot;
		for(int i=1; i<s; i++) {
			if(V[i]!=0){
				rot=0;
				for(int j=0,ii=i;j<s; j++,ii=(ii+1)%s){
					rot=rot*10+V[ii];
				}
				if(rot>value && !result.contains(rot))
					result.add(rot);
			}
		}
		if( result.isEmpty() )
			return null;
		int[] r = new int[result.size()];
		for(int i=0; i<r.length; i++)
			r[i]=result.get(i);
		return r;
	}
	
	static void precalculate() {
		for(int i=1; i<=MAX; i++){
			All[i] = rotate(i);
		}
	}
	static int solve( Scanner in ) {
		int A, B, sol=0;
		
		A = in.nextInt();
		B = in.nextInt();

		for( int i=A; i<=B; i++) {
//			List<Integer> result = rotate(i);
			if( All[i]!=null ) {
				for(int value: (int[])All[i] ) {
					if( value <= B )
						sol++;
				}
			}
		}

		return sol;
	}
	
	public static void main ( String args[] ) {
		int T; 
		Scanner in = new Scanner(System.in);
		T = in.nextInt();
		int cnt=0;
		int sol;
		precalculate();
		for( cnt=1; cnt<=T; cnt++ ) {
			sol = solve( in );
			System.out.printf("Case #%d: %d\n", cnt, sol);
		}

	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.util.ArrayList;

public class C {

	public static long convert(String input) {
		long output = 0;
		String[] pairs = input.split(" ");
		String first = pairs[0];
		String second = pairs[1];
		if (first.length() != 1) {
			long firstInt = Long.parseLong(first);
			long secondInt = Long.parseLong(second);
			for (long k = firstInt; k < secondInt; k++) {
				String firstNum = k + "";
				if (!same(firstNum)) {
					int len = firstNum.length();
					for (int i = 0; i < len - 1; i++) {
						char lastChar = firstNum.charAt(len - 1);
						String newFirstNum = lastChar
								+ firstNum.substring(0, len - 1);
//						 System.out.println(firstNum + "---" +
//								 newFirstNum);
//						list2.add(newFirstNum);
						long secondNum = Long.parseLong(newFirstNum);
						if ((secondNum + "").length() == firstNum.length()) {
							if (secondNum <= secondInt && secondNum > k
									) {
								output++;
//								 System.out.println(k + "---" +
//										 secondNum);
							}
						}
						firstNum = newFirstNum;
					}
				}
			}
		}

		return output;
	}


	private static boolean same(String s) {
		for (int i = 0; i < s.length() - 1; i++) {
			if (s.charAt(i) != s.charAt(i + 1))
				return false;
		}
		return true;
	}

	public static void main(String[] args) {
		String inputFile = "C-large.in";
		String outPutFile = "C-large.out";
		try {
			FileInputStream fstream = new FileInputStream(inputFile);
			DataInputStream in = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			FileWriter fstream2 = new FileWriter(outPutFile);
			BufferedWriter out = new BufferedWriter(fstream2);
			String strLine;
			strLine = br.readLine();
			int casesNum = Integer.parseInt(strLine);
			for (int i = 0; i < casesNum; i++) {
				strLine = br.readLine();
				String parse = "Case #" + (i + 1) + ": " + convert(strLine);
				System.out.println(parse);
				if (i < casesNum - 1)
					parse += "\n";
				out.write(parse);
			}
			in.close();
			out.close();
		} catch (Exception e) {
			System.err.println("Error: " + e.getMessage());
		}

	}

}
