diff --git a/scripts/build.js b/scripts/build.js
index a738fcb..6150b83 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -11,6 +11,10 @@ const buildFolder = path.join(scriptDir, '..', "build");
 const buildRawFolder = path.join(buildFolder, "raw");
 const atlas = {}
 const files = fs.readdirSync(mapsFolder)
+const isRule = (line) => {
+    return line.length < 10 && line.indexOf('=') > -1
+}
+const isComment = (line) => !isRule(line)
 files.forEach((file) => {
     const filePath = path.join(mapsFolder, file);
 
@@ -18,7 +22,8 @@ files.forEach((file) => {
     const fontName = path.parse(file).name;
     const fontMap = {};
     data.split('\n').forEach(l => {
-        if (l.startsWith('#')) return;
+        l = l.trim();
+        if (isComment(l)) return;
         const [lhs, rhs] = l.split('=').map(w => w.trim());
         if (lhs) fontMap[lhs] = rhs;
     })
diff --git a/scripts/find-longest.js b/scripts/find-longest.js
new file mode 100644
index 0000000..77cf4a4
--- /dev/null
+++ b/scripts/find-longest.js
@@ -0,0 +1,22 @@
+const fs = require('fs');
+const filename = process.argv[2];
+if (!filename) {
+    console.error("Please specify filename");
+    process.exit(1);
+}
+const text = fs.readFileSync(filename, 'utf-8');
+const known = {}
+let longest = ""
+let longestLength = 0
+text
+    .split('\n')
+    .forEach(l => {
+        if (l.startsWith('#')) return;
+        if (l.length > longestLength) {
+            longest = l;
+            longestLength = l.length
+        }
+    })
+
+console.log(longest)
+console.log(longestLength)
\ No newline at end of file