import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}


import java.io.*;
import java.util.*;

public class codejam2 {

    public static void main(String[] args) throws FileNotFoundException, IOException {
        File file = new File("C-small-attempt0.in");
        FileReader fr = new FileReader(file);
        Scanner ob = new Scanner(fr);
        File outFile = new File("outFile2.txt");
        FileWriter outFilew = new FileWriter(outFile);
        int t,r=1;
        t = ob.nextInt();
        while (t != 0) {
            int a, b;
            a = ob.nextInt();
            b = ob.nextInt();
            int i, j, k, count = 0;
            for (i = a; i < b; i++) {
                j = i;
                int h[]=new int[8];
                int c=0;
                String no = Integer.toString(j);
                for (k = no.length()-1; k>=0;k--) {
                    String temp = "";
                    temp=no.substring(k)+no.substring(0,k);
                    int s = Integer.parseInt(temp);
                    if (s > j && s <= b ) {
                        int flag=0;
                        for(int m=0;m<c;m++){
                            if(h[m]==s)
                                flag=1;
                        }
                        if(flag==0){
                        count++;
                        h[c++]=s;
                        //System.out.println(i+", "+s);
                        }
                    }
                }
            }
            //System.out.println("Case #"+r+": "+count);
            outFilew.append("Case #"+r+": "+count+"\n");
            t--;
            r++;
        }
        outFilew.close();
    }

}
