#!/bin/rc

awk -v 'op='$1	'
BEGIN{
	collect = isflag = 0
}

/^[ \t]*$/{
	next
}
/^#/{
	next
}
collect && /^[^	\t]/{
	collect = isflag = 0
}
collect && $0 ~ /[^ \t]+/{
	if($1 ~ op)
	for(i = 2; i <= NF; i++)
		flag[$i]++;
}
$0 ~ /^[^ \t]/{
	if($1 ~ "flags"){
		flags = 1;
		collect = 1;
	}
	next;
}

END{
	x = ""
	for(i in flag)
		x = x " " i
	print x;
}' $*(2-)