Add eos evaluation

Change-Id: Ia721ce1df8798fa2771059b4feb12eb56459325b
diff --git a/benchmarks/cleanup/tokenize_nn.pl b/benchmarks/cleanup/tokenize_nn.pl
new file mode 100644
index 0000000..3124c6a
--- /dev/null
+++ b/benchmarks/cleanup/tokenize_nn.pl
@@ -0,0 +1,14 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+my $c = '';
+foreach (<>) {
+  $c .= $_;
+};
+$c =~ s/^\n+//s;
+foreach my $c (split(/\n\n/, $c)) {
+  $c =~ s/[\s\n\t]+//g;
+  print $c, "\n";
+};
+