$14.$ What output is produced by the following program?

public class MysteryNums

$\{$

public static void main$($String$[]$ args$)$

$\{$

int x $=15$;

x $=$ sentence$($x$,42)$;

int y $=$ x $5$;

sentence$($y$,$ x $+$ y$)$;

sentence$($x$,$ y$)$;

$\}$

public static int sentence$($int num$1,$ int num$2)$

$\{$

num$1=$ num$2$ num$1$;

System.out.print$($num$1+""+$ num$2+"")$;

return num$1+$ num$2$;

$\}$

$\}$

$274269133-13864$

$274269133-564$

$27421525-510$

Compiled error because we cannot change the value of num$1$ which is a constant