import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.String;

public class PassModel{
    boolean debug = true;
    
    public PassModel(){
    }

    long startClock(char correct, char typed) {
        long retVal = 0; 
        if (correct == typed){
            retVal = System.currentTimeMillis();
        }
        return retVal;
    }

    long stopClock(char correct, char typed) {
        long retVal = 0;
        if (correct == typed){
            retVal = System.currentTimeMillis();
        }
        return retVal;
    }

    long timeElapsed(long start, long stop) {
        long timePassed = -1;
        timePassed = stop - start;
        System.out.println("Start time: " + start);
        System.out.println("Stop time: " + stop);
        System.out.println("Time elapsed: " + timePassed);
        return timePassed;
    }

}