open (IN,"in.txt") or die "$!";
open (OUT,">out.txt") or die "$!";
$_=<IN>;
chomp;
print OUT ;
while (<IN>){
  chomp;
  if (m!\\(.*)!){
    print OUT (" ".$1);
  } else {
    print OUT "\n$_";
  }
}
print OUT "\n";