diff --git a/app/src/main/java/es/eoinrul/ecwt/DitDahGenerator.kt b/app/src/main/java/es/eoinrul/ecwt/DitDahGenerator.kt
index 5436c0f..9027ef5 100644
--- a/app/src/main/java/es/eoinrul/ecwt/DitDahGenerator.kt
+++ b/app/src/main/java/es/eoinrul/ecwt/DitDahGenerator.kt
@@ -29,6 +29,7 @@ fun StringToSoundSequence(s : String) : List<SoundTypes> {
 
     val first = when(s[0]) {
         ' ' -> listOf(SoundTypes.WORD_SPACE)
+        // Letters
         'A' -> listOf(
             SoundTypes.DIT,
             SoundTypes.DAH,
@@ -197,6 +198,7 @@ fun StringToSoundSequence(s : String) : List<SoundTypes> {
             SoundTypes.DAH,
             SoundTypes.LETTER_SPACE
         )
+        // Digits
         '1' -> listOf(
             SoundTypes.DIT,
             SoundTypes.DAH,
@@ -269,6 +271,7 @@ fun StringToSoundSequence(s : String) : List<SoundTypes> {
             SoundTypes.DIT,
             SoundTypes.LETTER_SPACE
         )
+        // Punctuation
         '.' -> listOf(
             SoundTypes.DIT,
             SoundTypes.DAH,