diff --git a/tts.py b/tts.py
index 4a0bdde..831903b 100644
--- a/tts.py
+++ b/tts.py
@@ -1,4 +1,3 @@
-
 """
 Text-to-speech synthesis (TTS)
 
@@ -36,8 +35,8 @@ def main():
     sentences = []
 
     # Read input file
-    with open(args['input'], "r", encoding="utf-8") as f:
-        lines = f.readlines()
+    with open(args['input'], "r", encoding="utf-8") as file:
+        lines = file.readlines()
 
     # Convert to sentences
     for line in lines:
@@ -67,8 +66,8 @@ def main():
         line = line.replace("?", "?.  ")
         line = line.replace("(", ". ")
 
-        for x in line.split(". "):
-            sentences.append(x.strip())
+        for sentence in line.split(". "):
+            sentences.append(sentence.strip())
             sentences.append("<PAUSE>")
 
     # Synthesis text