import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Q3M {
	public static void main(String[] args) throws Exception {
		compute();
	}

	private static void compute() throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(new File(
				"C:\\work\\Q3\\C-small-attempt0.in")));
		String line = null;
		int i = Integer.parseInt(br.readLine());
		List l = new ArrayList();
		for (int j = 0; j < i; j++) {
			line = br.readLine();
			String[] nums = line.split(" ");
			l.add(calculate(nums));
		}
		writeOutput(l);
	}

	private static int calculate(String[] nums) {
		int min = Integer.parseInt(nums[0]);
		int max = Integer.parseInt(nums[1]);
		int count = 0;
		List l = new ArrayList();
		for (int i = min; i <= max; i++) {
			for (int times = 1; times < countDigits(i); times++) {
				int res = shiftNum(i, times);
				if (res <= max && i < res) {
					if ((!l.contains((i + ":" + res)))) {
						l.add(i + ":" + res);
						l.add(res + ":" + i);
						count++;
					}
				}
			}
		}
		return count;
	}

	private static boolean checkZeros(int temp, int res) {
		if (temp % 10 == 0 || res % 10 == 0)
			return false;
		return true;
	}

	private static int shiftNum(int n, int times) {
		int base = (int) Math.pow(10, times);
		int temp2 = n / base;
		int placeHolder = (int) Math.pow((double) 10,
				(double) countDigits(temp2));
		int res = placeHolder * (n % base) + temp2;
		if (countDigits(res) == countDigits(n)) {
			return res;
		} else {
			return 2000001;
		}
	}

	public static int countDigits(int x) {
		if (x < 10)
			return 1;
		else {
			return 1 + countDigits(x / 10);
		}
	}

	private static void writeOutput(List l) throws Exception {
		StringBuffer b = new StringBuffer();
		int i = 1;
		BufferedWriter br = new BufferedWriter(new FileWriter(new File(
				"C:\\work\\Q3\\ans.txt")));
		for (Iterator iterator = l.iterator(); iterator.hasNext();) {
			br.write("Case #" + i++ + ": " + iterator.next());
			br.newLine();
		}
		br.close();
	}

}
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.FileWriter;

class Start{
	BufferedInputStream bis=new BufferedInputStream(System.in);
	PrintWriter out=new PrintWriter(System.out, true);
	int i,j,k,l,m,n,o,p,q,r,s,t,w,x,y,z,ry,rz,rs;
	long a,b,c;
	double d,e,f,g,h;
	char u,v;
	String st;
	int[] in,arr,res;
	final double pi=3.14159265;
	final double l2=0.69314718;

	char chr()throws IOException{
		while((ry=bis.read())==10 || ry==13 || ry==32){}
		return (char)ry;
	}

	int num()throws IOException{
		rz=0;rs=0;
		ry=bis.read(); if(ry=='-') rs=-1; else rz+=(ry-'0');
		while((ry=bis.read())>='0' && ry<='9') rz=rz*10+(ry-'0');
		if(rs==-1) rz=-rz;
		if(ry==13) bis.read();
		return rz;
	}

	String str()throws IOException{
		StringBuilder sb=new StringBuilder();
		while((ry=bis.read())!=10 & ry!=13 && ry!=32) sb.append((char)ry);
		if(ry==13) bis.read();
		return sb.toString();
	}

	String line()throws IOException{
		StringBuilder sb=new StringBuilder();
		while((ry=bis.read())!=10 && ry!=13) sb.append((char)ry);
		if(ry==13)bis.read();
		return sb.toString();
	}

	int log2(double par){return (int)(Math.log(par)/l2);}

	long perm(int p1,int p2){
		long ret=1; int it;
		it=p1; while(it>p2) ret*=it--;
		return ret;
	}

	long comb(int p1,int p2){
		long ret=1; int it;
		if(p2<p1-p2) k=p1-p2;
		it=p1; while(it>p2) ret*=it--;
		it=p1-p2; while(it>1) ret/=it--;
		return ret;
	}

	public void go()throws IOException{
		out =new PrintWriter(new FileWriter("out.txt"),true);
		t=num();
		w=t;
		while(--t>=0){
			a=0;
			y=num();
			z=num();
			if(y<10) y=10;
			p=(int)Math.log10((double)z);
			q=(int)Math.pow(10.0, (double)p);

			for(i=y; i<=z; i++)
			{
				k=i;
				r=p;
				while(r-->0){
					k = (k/10) + ((k%10)*q);
					if(k>i && k<=z) a++;
				}
			}
			out.println("Case #"+(w-t)+": "+a);
		}
		while(bis.available()>0)bis.read();
		out.close();
	}

	public static void main(String args[])throws IOException{new Start().go();}
}
