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

public class C {

    void solve() throws IOException {
        in("C-large.in"); out("C-large.out");

        long tm = System.currentTimeMillis();
        boolean[] mask = new boolean[2000000];
        int[] r = new int[10];
        int t = readInt();
        for (int cs = 1; cs <= t; ++cs) {
            int a = readInt();
            int b = readInt();
            int ans = 0;
            for (int m = a + 1; m <= b; ++m) {
                char[] d = String.valueOf(m).toCharArray();
                int c = 0;
                for (int i = 1; i < d.length; ++i) {
                    if (d[i] != '0' && d[i] <= d[0]) {
                        int n = 0;
                        for (int j = 0; j < d.length; ++j) {
                            int jj = i + j;
                            if (jj >= d.length) jj -= d.length;
                            n = n * 10 + (d[jj] - '0');
                        }
                        if (n >= a && n < m && !mask[n]) {
                            ++ans;
                            mask[n] = true;
                            r[c++] = n;
                        }
                    }
                }
                for (int i = 0; i < c; ++i) {
                    mask[r[i]] = false;
                }
            }
            println("Case #" + cs + ": " + ans);
            //System.out.println(cs);
        }
        System.out.println("time: " + (System.currentTimeMillis() - tm));
        exit();
    }

    void in(String name) throws IOException {
        if (name.equals("__std")) {
            in = new BufferedReader(new InputStreamReader(System.in));
        } else {
            in = new BufferedReader(new FileReader(name));
        }
    }

    void out(String name) throws IOException {
        if (name.equals("__std")) {
            out = new PrintWriter(System.out);
        } else {
            out = new PrintWriter(name);
        }
    }

    void exit() {
        out.close();
        System.exit(0);
    }

    int readInt() throws IOException {
        return Integer.parseInt(readToken());
    }

    long readLong() throws IOException {
        return Long.parseLong(readToken());
    }

    double readDouble() throws IOException {
        return Double.parseDouble(readToken());
    }

    String readLine() throws IOException {
        st = null;
        return in.readLine();
    }

    String readToken() throws IOException {
        while (st == null || !st.hasMoreTokens()) {
            st = new StringTokenizer(in.readLine());
        }
        return st.nextToken();
    }

    boolean eof() throws IOException {
        return !in.ready();
    }

    void print(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void println(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void print(Object value) {
        out.print(value);
    }

    void println(Object value) {
        out.println(value);
    }

    void println() {
        out.println();
    }

    StringTokenizer st;

    BufferedReader in;
    PrintWriter out;

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

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

public class Ricky
{
    public static void main(String []args)
    {
        try{
            FileInputStream fstream = new FileInputStream("input.in");
              DataInputStream in = new DataInputStream(fstream);
              BufferedReader br = new BufferedReader(new InputStreamReader(in));
              String strLine;
              int n=0;
              FileWriter fstream1 = new FileWriter("out.in");
              BufferedWriter out = new BufferedWriter(fstream1);
              int i;
            while ((strLine = br.readLine()) != null)   
            {
                n=n+1;
                if (n==1) i = Integer.parseInt(strLine);
                else {
                    System.out.println (parse(strLine,n-1));
                    out.write(parse(strLine,n-1)+"\n");
                }
             
            
            }
            out.close();
  in.close();
    }catch (Exception e){//Catch exception if any
  System.err.println("Error: " + e.getMessage());
  }
    }

    private static String parse(String string1,int oo) 
    {
        String str="";
        int count =0;
        long aa = 0;
        long bb = 0; 
        
  	  StringTokenizer stringTokenizer = new  StringTokenizer(string1);
  	  	while(stringTokenizer.hasMoreTokens())
		  {
		  aa = Integer.parseInt(stringTokenizer.nextToken());
		  bb = Integer.parseInt(stringTokenizer.nextToken());
		  }
        
  	  for (long i = aa ;  i < bb;  i = i+1) 
  	  {    
  		  if(i<10)
  		  {
  			  count = 0;
  		  }
  		  else if(i>=10 && i<100)
  		  {
  			int m = (int) (i/10);
  			int n = (int) (i%10);	
  			int nm = 10*n + m;
  			if(i<nm && nm<= bb)
  			{ count++;}
  			
  		  }
  		else if(i>=100 && i<1000)
		  {
  			int mn = (int) (i/10);
  			int z = (int) (i%10);	
  			int zmn = 100*z + mn;
  			if(i<zmn && zmn<= bb)
  			{ count++;}  	
  			
  			
  			int m = (int) (i/100);
  			int nz = (int) (i%100);	
  			int nzm = 10*nz + m;
  			if(i<nzm && nzm<= bb)
  			{ count++;}  			
  			
  			
  			
		  }
  		else if(i>=1000 && i<10000)
		  {
  			int mnz = (int) (i/10);
  			int t = (int) (i%10);	
  			int tmnz = 1000*t + mnz;
  			if(i<tmnz && tmnz<= bb )
  			{ count++;}  	
		int mn = (int) (i/100);
  			int zt = (int) (i%100);	
  			int ztmn = 100*zt + mn;
  			if(i<ztmn && ztmn<= bb)
  			{ count++;}  			
  			int m = (int) (i/1000);
  			int nzt = (int) (i%1000);	
  			int nztm = 10*nzt + m;
  			if(i<nztm && nztm<= bb && (mn!=zt))
  			{ count++;}  			
  		  }
  		else if(i>=10000 && i<100000)
		  {
  			int mnzt = (int) (i/10);
  			int w = (int) (i%10);	
  			int wmnzt = 10000*w + mnzt;
  			if(i<wmnzt && wmnzt<= bb )
  			{ count++;}  	
		int mnz = (int) (i/100);
  			int tw = (int) (i%100);	
  			int twmnz = 1000*tw + mnz;
  			if(i<twmnz && twmnz<= bb)
  			{ count++;}  			
 	
  			
  			
  			int mn = (int) (i/1000);
  			int ztw = (int) (i%1000);	
  			int ztwmn = 100*ztw + mn;
  			if(i<ztwmn && ztwmn<= bb )
  			{ count++;}  			
 
  			
  			int m = (int) (i/10000);
  			int nztw = (int) (i%10000);	
  			int nztwm = 10*nztw + m;
  			if(i<nztwm && nztwm<= bb )
  			{ count++;}  			
 			
  			
  			
		  }
  		else if(i>=100000 && i<1000000)
		  {
  			int mnzt = (int) (i/10);
  			int w = (int) (i%10);	
  			int wmnzt = 100000*w + mnzt;
  			if(i<wmnzt && wmnzt<= bb )
  			{ count++;}  	
 
  			
  			int mnz = (int) (i/100);
  			int tw = (int) (i%100);	
  			int twmnz = 10000*tw + mnz;
  			if(i<twmnz && twmnz<= bb)
  			{ count++;}  			
  	  	
  			
  			
  			int mn = (int) (i/1000);
  			int ztw = (int) (i%1000);	
  			int ztwmn = 1000*ztw + mn;
  			if(i<ztwmn && ztwmn<= bb )
  			{ count++;}  			
  	
  			
  			int m = (int) (i/10000);
  			int nztw = (int) (i%10000);	
  			int nztwm = 100*nztw + m;
  			if(i<nztwm && nztwm<= bb &&(mn!=ztw))
  			{ count++;}  			
  		
  			
  			int ml = (int) (i/100000);
  			int nztwx = (int) (i%100000);	
  			int nztwxm = 10*nztwx + ml;
  			if(i<nztwxm && nztwxm<= bb &&(mn!=ztw) )
  			{ count++;}  			
  					
  			
  			
		  }
  		else if(i>=1000000 && i<10000000)
		  {
 			int mnzt = (int) (i/10);
  			int w = (int) (i%10);	
  			int wmnzt = 1000000*w + mnzt;
  			if(i<wmnzt && wmnzt<= bb )
  			{ count++;}  	
 
  			
  			int mnz = (int) (i/100);
  			int tw = (int) (i%100);	
  			int twmnz = 100000*tw + mnz;
  			if(i<twmnz && twmnz<= bb)
  			{ count++;}  			
	
  			
  			
  			int mn = (int) (i/1000);
  			int ztw = (int) (i%1000);	
  			int ztwmn = 10000*ztw + mn;
  			if(i<ztwmn && ztwmn<= bb )
  			{ count++;}  			

  			
  			int m = (int) (i/10000);
  			int nztw = (int) (i%10000);	
  			int nztwm = 1000*nztw + m;
  			if(i<nztwm && nztwm <= bb )
  			{ count++;}  			
  			
  			
  			int ml = (int) (i/100000);
  			int nztwx = (int) (i%100000);	
  			int nztwxm = 100*nztwx + ml;
  			if(i<nztwxm && nztwxm <= bb )
  			{ count++;}  			
  			
  			
  			
  			int a = (int) (i/1000000);
  			int bcdefg = (int) (i%1000000);	
  			int bcdefga = 10*bcdefg + a;
  			if(i<bcdefga && bcdefga<= bb  )
  			{ count++;}  			
  			
  			
		  }
  		else if(i>=10000000 && i<100000000)
		  {}
  		  else
  		  {}
  	  }
        return "Case #"+oo+": "+count;
     }
    
 
    
}