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

public class recycled_numbers {
	public static void main(String[]a) throws Exception{
		
		Scanner f = new Scanner(new File(a[0]));
		int result=0;
		int A,B;
		String n,m;
		HashSet<String> s=new HashSet<String>();
		
		int T=f.nextInt();	//T total case count
		for (int t=1; t<=T;t++){//for each case t
			
			s.clear();
			result=0;				//reset
			A=f.nextInt();B=f.nextInt();	//get values for next case
			
			if (A==B)result=0;//remove case not meeting problem limits 
			else{
				for(int i=A;i<=B;i++){//for each int in range
					n=Integer.toString(i);
					m=new String(n);
					//System.out.println(n);
					for (int j=1;j<n.length();j++){//move each digit to the front & test
						m = m.substring(m.length()-1)+m.substring(0,m.length()-1);
						if(m.matches("^0+[\\d]+")!=true &&
								Integer.parseInt(m)<=B &&
								Integer.parseInt(n)<Integer.parseInt(m)){
							s.add(new String(n+","+m));
							//result++;
							//System.out.println(" matched: "+m);
						}
						
					}
				}
				result = s.size();
			}

			//display output
			System.out.println("Case #" + t + ": " + result);
		}
	}
}
import java.io.*;
import java.util.*;

/**
 * @author Ivan Romanov
 */
public class C {

    private String solve() throws IOException {
        int a = nextInt();
        int b = nextInt();
        int ans = 0;
        for (int i = a; i < b; i++) {
            if (recycle.containsKey(i)) {
                for (int j : recycle.get(i)) {
                    if (j <= b) {
                        ans++;
                        // System.out.println(i + " " + j);
                    }
                }
            }
        }
        return "" + ans;
    }

    private Map<Integer, Set<Integer>> recycle = new HashMap<Integer, Set<Integer>>();

    private void prepare() {
        int mul = 1;
        int dig = 1;
        for (int x = 10; x <= 2000000; x++) {
            if (mul * 10 == x) {
                mul *= 10;
                dig++;
            }
            Set<Integer> recs = new HashSet<Integer>();
            int t = x;
            for (int i = 1; i < dig; i++) {
                int last = t % 10;
                t /= 10;
                t += last * mul;
                if (t > x) {
                    recs.add(t);
                }
            }
            if (!recs.isEmpty()) {
                recycle.put(x, recs);
            }
        }
    }

    private BufferedReader reader;

    private StringTokenizer tt = new StringTokenizer("");

    private String nextToken() throws IOException {
        while (!tt.hasMoreTokens()) {
            tt = new StringTokenizer(reader.readLine());
        }
        return tt.nextToken();
    }

    private int nextInt() throws IOException {
        return Integer.parseInt(nextToken());
    }

    private void run() throws IOException {
        String problem = "C-large";
        reader = new BufferedReader(new FileReader(problem + ".in"));
        PrintWriter writer = new PrintWriter(new File(problem + ".out"));
        try {
            prepare();
            int cases = nextInt();
            int tc = 1;
            while (tc <= cases) {
                writer.print("Case #" + tc + ": ");
                writer.println(solve());
                tc++;
            }
        } finally {
            reader.close();
            writer.close();
        }
    }

    public static void main(String[] args) {
        try {
            new C().run();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}