public class P1for2016 {

public static void main(String[] args){

String str[] = new String[]{"2","3","4"};

RandomStringChooser rsc = new RandomStringChooser(str);

}

}

class RandomStringChooser {

private String[] values;

private int valuesRemaining;

public RandomStringChooser(String[] str)

{

values = new String[str.length];

for(int i = 0; i < values.length; i++)

values[i] = str[i];

valuesRemaining = values.length;

}

public String getNext()

{

if(valuesRemaining == 0) {

return "NONE";

}

int index = (int) (Math.random() * valuesRemaining);

String selected = values[index];

values[index] = values[valuesRemaining - 1];

valuesRemaining--;

return selected;

}

}