int tuple[];
NaturalNumberTuple nnt;
public NaturalNumberTuple(int[] numbers) {
    int[] tuple = new int[numbers.length];
    for(int i : numbers){
        tuple[i] = numbers[i];
    }
    // TODO implement constructor
   // throw new UnsupportedOperationException("Constructor not yet implemented");
}

/**
 * Inserts the specified {@code number} at the end of this tuple. If {@code number} is smaller or equal to 0, this
 * method has no effect.
 *
 * @param number
 *            the number to be inserted
 * @return the tuple resulting from inserting the specified {@code number}. If {@code number} is smaller or equal to
 *         0, this tuple is returned without any modifications.
 */
public NaturalNumberTuple insert(int number) {
    int placeholderTuple[] = new int[tuple.length+1];
    for(int i : tuple){
        placeholderTuple[i] = tuple[i];
        if(number > 0){
            placeholderTuple[placeholderTuple.length-1] = number;
    }
}
return nnt.NaturalNumberTuple(placeholderTuple[]);
}