diff --git a/cli/operators.pl b/cli/operators.pl
index 2d247d3..c2dfd12 100644
--- a/cli/operators.pl
+++ b/cli/operators.pl
@@ -1,5 +1,11 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+
 sub println {
-    printf("%s\n", shift());
+    local $, = "";
+    print +(@_ ? @_ : $_), $/;
 }
 
 
@@ -58,7 +64,7 @@ my $c = <STDIN>;
 my $ncookies = 0;
 
 sub printcookies {
-    print "I like cookies " . $ncookies++ . "\n";
+    println("I like cookies " . $ncookies++);
 }