What will be the possible outputs for the following program?

#include

#include

#include

using namespace std;

mutex m$1$;

mutex m$2$;

void funcB$()\{$

unique$\_$lock l$($m$1)$;

for $($int i $=6$; i $<9$; i$++)\{$

if $($i $==8)$

return;

cout $<<$ i;

$\}$

$\}$

int main$()\{$

thread th$3($funcB$)$;

thread th$4($funcB$)$;

th$3.$join$()$;

th$4.$join$()$;

$\}$