BEGIN {prev2 = "qq"}
$2 == prev2 { print $1,$3,$4,$5;
		prev2 = "qq";
		next;
}
{ if ( $1 == "a"){
		print "s",$2;
		next;
} else if (prev2 != "qq")
	print  p0, p1,p2, p3;
prev2 = $2;

p0 = $1;
p1 = $3;
p2 = $4;
p3 = $5;
}