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.util.Arrays;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class rec {

	public static void main(String[] args)
	{
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		for (int c = 1; c <= t; c++)
		{
			System.out.println("Case #" + c + ": " + solve(sc));
		}
	}

	static void debug(Object... objects)
	{
		System.out.println(Arrays.deepToString(objects));
	}
	
	static final int po[]={1,10,100,1000,10000,100000,1000000,10000000};
	
	public static String solve(Scanner sc)
	{
		int A=sc.nextInt();
		int B=sc.nextInt();
		Set<P> s = new HashSet<P>();
		int N = Integer.toString(A).length();
		for(int i=A;i<=B;i++)
		{
			for(int k=1;k<N;k++)
			{
				int m=i%po[k];
				int p=i/po[k];
				int c = m*po[N-k]+p;
				P np=new P(i,c);
				if(i < c && c <= B && !s.contains(np))
				{
					s.add(np);
				}
			}
		}
		return Integer.toString(s.size());
	}
	
	private static class P
	{
		int v;
		int k;
		public P(int v, int k)
		{
			super();
			this.v = v;
			this.k = k;
		}
		@Override
		public boolean equals(Object obj)
		{
			if(obj == this) return true;
			if(!(obj instanceof P)) return false;
			P p = (P)obj;
			return v == p.v && k == p.k;
		}
		@Override
		public int hashCode()
		{
			int res=17;
			res = res*31 + v;
			res = res*31 + k;
			return res;
		}
	}
}