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


public class Recycle2 {

	
	private static int solve(int L, int H) {
		class Slice {
			int L,H,mul,dig;
			Slice(int LL,int HH,int Mull,int digg) {
				L=LL; H=HH; mul=Mull; dig=digg;
			}
			public String toString() { return String.format("%d-%d, %d(%d)", L,H,mul,dig); }
		}
			
		ArrayList<Slice> slices = new ArrayList<Slice>();
			
		int k = 10, d=1;
		int l = L, h=H;
		while(true) {
			if (l>=k) {
				k*=10;d++;
				continue;
			}
			if (h<k) {
				slices.add( new Slice(l,h,k/10,d));
				break;
			} else {
				slices.add( new Slice(l,k-1,k/10,d));
				l=k;
				k=k*10;d++;
				continue;
			}
		}
		
		class Pair {
			int i,j;
			Pair(int ii,int jj) {i=ii;j=jj;}
			boolean equal(Pair p) {
				return p.i==i && p.j==j;
			}
			public String toString() { return String.format("(%d,%d)",i,j); }
		}
		
		ArrayList<Pair> ps = new ArrayList<Pair>();
		
		int ret = 0;
		//System.out.println(slices);
		for(Slice slice:slices) {
			for(int i=slice.L; i<=slice.H; i++) {
				int n=i;
				ArrayList<Integer> past = new ArrayList<Integer>();
				for (int j=0;j<(slice.dig-1);j++) {
					int dd=n%10;
					n=(n/10)+dd*slice.mul;
					if (n>i && n<=slice.H && !past.contains(n)) {
						//System.out.println("checking (" + i + ", " + n + ")");
						/*Pair p=new Pair(i,n);
						for(Pair c:ps) {
							if (c.equal(p)) {
								System.out.println("Duplicate: " + p);
							}
						}
						ps.add(p);*/
						ret++;
						past.add(n);
					}
				}
				
			}
		}
	
		return ret;
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		
		Scanner in = new Scanner(System.in);
		int T = in.nextInt();
		for(int t=1;t<=T;t++) {
			int L = in.nextInt();
			int H = in.nextInt();
			System.out.printf("Case #%d: %d%n", t, solve(L,H));
		}

	}

}
