What is the output of this Java program?

class Driver $\{$

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

int a $=4$;

int b $=$ a $+10$;

while $($a $<$ b$)\{$

a $=$ a $+2$;

b $=$ b $-2$;

$\}$

System.out.print$($a $+$ b$)$;

$\}$

$\}$