#include

int main$()\{$

int stop;

int result;

int a;

int b;

scanf$("\%$d$",$ &stop$)$;

result $=0$;

for $($a $=1$; a $<mtext></mtext><mn>3</mn>$; $++$a$)\{$

printf$("\%$d: $",$ a$)$;

for $($b $=0$; b $<mtext></mtext><mn>2</mn>$; $++$b$)\{$

result $+=$ a;

if $($result $>$ stop$)\{$

printf$("\_")$;

continue;

$\}$

printf$("\%$d$,",$ result$)$;

$\}$

printf$("$

$")$;

$\}$

$\}$

input: $6$

output:??