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.FileWriter;
import java.io.InputStream;
import java.io.InputStreamReader;

public class RecycledNumbers {
	public static void main(String[] args) {
		try {
			run();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private static void run() throws Exception {
		writeResult(calc(readInputData()));
	}

	private static int[] calc(Data[] data) {
		int[] res = new int[data.length];

		for (int i = 0; i < data.length; i++) {
			res[i] = calc(data[i]);
			// System.out.println("Case #" + (i + 1) + ": " + res[i]);
		}

		return res;
	}

	private static int calc(Data data) {
		if (data.len <= 1)
			return 0;

		int res = 0;

		for (int i = data.a; i < data.b; i++) {
			int pp = (int)Math.pow(10, data.len - 1);

			for (int j = 1, p = 10; j < data.len; j++, p *= 10, pp /= 10) {
				int x = i % p;
				int y = i / p;
				int rev = x * pp + y;

				if (x == y)
					break;
				if (rev > i && rev >= data.a && rev <= data.b)
					res++;
			}
		}

		return res;
	}

	private static Data[] readInputData() throws Exception {
		InputStream in = RecycledNumbers.class.getResourceAsStream("/test.in");
		BufferedReader br = new BufferedReader(new InputStreamReader(in));

		int total = Integer.parseInt(br.readLine());
		Data[] data = new Data[total];

		for (int i = 0; i < total; i++)
			data[i] = new Data(br.readLine().split("\\s"));

		in.close();

		return data;
	}

	private static void writeResult(int[] res) throws Exception {
		BufferedWriter out = new BufferedWriter(new FileWriter("d:\\!!!\\test.out"));

		for (int i = 1; i <= res.length; i++)
			out.write("Case #" + i + ": " + res[i - 1] + "\n");

		out.close();
	}
}

class Data {
	final int len;
	final int a;
	final int b;

	Data(int a, int b) {
		this.a = a;
		this.b = b;
		this.len = 0;
	}

	Data(String[] str) {
		this.a = Integer.parseInt(str[0]);
		this.b = Integer.parseInt(str[1]);

		this.len = str[0].length();
	}

	@Override
	public String toString() {
		return "[" + a + ";" + b + "]";
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + Math.min(a, b);
		result = prime * result + Math.max(a, b);
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Data other = (Data)obj;
		if (a != other.a)
			return false;
		if (b != other.b)
			return false;
		return true;
	}
}
