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.awt.Polygon;
import java.awt.geom.Point2D;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.StringTokenizer;

public class C implements Runnable {

	
	int rotate(int a, int pw) {
		return (a / 10) + (a % 10) * pw;
	}
	
	private void solve() throws IOException {
		int a = nextInt();
		int b = nextInt();
		
		int pw10 = 1;
		for (; pw10 * 10 <= a; pw10 *= 10)
			;
		
//		System.out.println(rotate(1, 10));
			
		boolean[] was = new boolean[b + 1];
		int qlen = 0;
		long ans = 0;
		for (int i = a; i <= b; ++i) {
			
			qlen = 1;
			was[i] = true;
			for (int j = rotate(i, pw10); j > b || !was[j]; j = rotate(j, pw10)) {
				if (a <= j && j <= b) {
					was[j] = true;
					++qlen;
				}				
			}
			ans += qlen * (qlen - 1) / 2;
		}
		out.println(ans);		
	}

	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		(new Thread(new C())).start();
	}

	private BufferedReader br;
	private StringTokenizer st;
	private PrintWriter out;
	private String filename = "";

	@Override
	public void run() {
		try {
			br  = new BufferedReader(new FileReader("input.txt"));
			st  = new StringTokenizer("");
			out = new PrintWriter("output.txt");
			int T = nextInt();
			for (int i = 1; i <= T; ++i) {
				out.print("Case #" + i + ": ");
				solve();
			}
			out.close();
		} catch (Exception e) {
			e.printStackTrace();
			System.exit(-1);
		}		
	}

	String next() throws IOException {
		while (!st.hasMoreTokens()) {
			String temp = br.readLine();
			if (temp == null) {
				return null;
			}
			st = new StringTokenizer(temp);
		}
		return st.nextToken();		
	}
	int nextInt() throws IOException {
		return Integer.parseInt(next());
	}
	long nextLong() throws IOException {
		return Long.parseLong(next());
	}
	double nextDouble() throws IOException {
		return Double.parseDouble(next());
	}
}
