package jp.funnything.competition.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;

import org.apache.commons.io.IOUtils;

public class QuestionReader {
    private final BufferedReader _reader;

    public QuestionReader( final File input ) {
        try {
            _reader = new BufferedReader( new FileReader( input ) );
        } catch ( final FileNotFoundException e ) {
            throw new RuntimeException( e );
        }
    }

    public void close() {
        IOUtils.closeQuietly( _reader );
    }

    public String read() {
        try {
            return _reader.readLine();
        } catch ( final IOException e ) {
            throw new RuntimeException( e );
        }
    }

    public BigDecimal[] readBigDecimals() {
        return readBigDecimals( " " );
    }

    public BigDecimal[] readBigDecimals( final String separator ) {
        final String[] tokens = readTokens( separator );

        final BigDecimal[] values = new BigDecimal[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = new BigDecimal( tokens[ index ] );
        }

        return values;
    }

    public BigInteger[] readBigInts() {
        return readBigInts( " " );
    }

    public BigInteger[] readBigInts( final String separator ) {
        final String[] tokens = readTokens( separator );

        final BigInteger[] values = new BigInteger[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = new BigInteger( tokens[ index ] );
        }

        return values;
    }

    public int readInt() {
        final int[] values = readInts();

        if ( values.length != 1 ) {
            throw new IllegalStateException( "Try to read single interger, but the line contains zero or multiple values" );
        }

        return values[ 0 ];
    }

    public int[] readInts() {
        return readInts( " " );
    }

    public int[] readInts( final String separator ) {
        final String[] tokens = readTokens( separator );

        final int[] values = new int[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = Integer.parseInt( tokens[ index ] );
        }

        return values;
    }

    public long readLong() {
        final long[] values = readLongs();

        if ( values.length != 1 ) {
            throw new IllegalStateException( "Try to read single interger, but the line contains zero or multiple values" );
        }

        return values[ 0 ];
    }

    public long[] readLongs() {
        return readLongs( " " );
    }

    public long[] readLongs( final String separator ) {
        final String[] tokens = readTokens( separator );

        final long[] values = new long[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = Long.parseLong( tokens[ index ] );
        }

        return values;
    }

    public String[] readTokens() {
        return readTokens( " " );
    }

    public String[] readTokens( final String separator ) {
        return read().split( separator );
    }
}

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.util.Scanner;

class Solution {
    private final String FILE_IN = "C-small-attempt0.in";
    private final String FILE_OUT = "C-small-attempt0.out";
    
    private final Scanner mScanner;
    private final PrintWriter mOut;

    private final int[] shifts = new int[7];
    private int shiftsCount = 0;
    
    public Solution() throws FileNotFoundException {
        mScanner = new Scanner(new FileInputStream(FILE_IN));
        mOut = new PrintWriter(new FileOutputStream(FILE_OUT));
    }
    
    public void closeFiles() {
        mScanner.close();
        mOut.close();
    }
    
    private int digitsAmount(int number) {
        int r = 0;
        while (number > 0) {
            number /= 10;
            r++;
        }
        return r;
    }
    
    private static int shiftRight(int number, int d) {
        int last = number % 10;
        for (int i = 0; i < d - 1; i++) {
            last *= 10;
        }
        
        return number / 10 + last;
    }
    
    private boolean isShiftedAlready(int shifted) {
        for (int i = 0; i < shiftsCount; i++) {
            if (shifts[i] == shifted) {
                return true;
            }
        }
        return false;
    }
    
    private void solve(int caseId, int A, int B) {
        int r = 0;
        int d = digitsAmount(A);
        
        for (int i = A; i < B; i++) {
            int shifted = i;
            shiftsCount = 0;
            for (int k = 0; k < d - 1; k++) {
                shifted = shiftRight(shifted, d);
                if (i < shifted && shifted <= B && !isShiftedAlready(shifted)) {
                    r++;
                    shifts[shiftsCount] = shifted;
                    shiftsCount++;
                }
            }
        }
        mOut.println("Case #" + (caseId + 1) + ": " + r);
    }
    
    public Solution run() {
        int n = mScanner.nextInt();
        mScanner.nextLine();
        
        for (int i = 0; i < n; i++) {
            int A = mScanner.nextInt();
            int B = mScanner.nextInt();
            if (mScanner.hasNext()) {
                mScanner.nextLine();
            }
            
            solve(i, A, B);
        }
        return this;
    }
}

public class Main {
    public static void main(String[] args) throws FileNotFoundException {
        new Solution().run().closeFiles();
    }
}
