diff --git a/learning-irregular-verbs-in-English.el b/learning-irregular-verbs-in-English.el
index 77ce3d6..00d83be 100644
--- a/learning-irregular-verbs-in-English.el
+++ b/learning-irregular-verbs-in-English.el
@@ -14,106 +14,106 @@
 (defun learning-irregular-verbs-in-English ()
   "Application to learn and review irregular verbs in English."
   (interactive)
-  (let ((learning-irregular-verbs-in-English--verbs '(("be" "was/were" "been")
-		 ("beat" "beat" "beaten")
-		 ("become" "became" "become")
-		 ("begin" "began" "begun")
-		 ("bend" "bent" "bent")
-		 ("bet" "bet" "bet")
-		 ("bite" "bit" "bitten")
-		 ("bleed" "bled" "bled")
-		 ("blow" "blew" "blown")
-		 ("break" "broke" "broken")
-		 ("bring" "brought" "brought")
-		 ("build" "built" "built")
-		 ("burn" "burnt" "burnt")
-		 ("buy" "bought" "bought")
-		 ("catch" "caught" "caught")
-		 ("choose" "chose" "chosen")
-		 ("come" "came" "come")
-		 ("cost" "cost" "cost")
-		 ("cut" "cut" "cut")
-		 ("dig" "dug" "dug")
-		 ("do" "did" "done")
-		 ("draw" "drew" "drawn")
-		 ("dream" "dreamt" "dreamt")
-		 ("drink" "drank" "drunk")
-		 ("drive" "drove" "driven")
-		 ("eat" "ate" "eaten")
-		 ("fall" "fell" "fallen")
-		 ("feed" "fed" "fed")
-		 ("feel" "felt" "felt")
-		 ("fight" "fought" "fought")
-		 ("find" "found" "found")
-		 ("fly" "flew" "flown")
-		 ("forget" "forgot" "forgotten")
-		 ("forgive" "forgave" "forgiven")
-		 ("freeze" "froze" "frozen")
-		 ("get" "got" "got")
-		 ("give" "gave" "given")
-		 ("go" "went" "gone")
-		 ("grow" "grew" "grown")
-		 ("hang" "hung" "hung")
-		 ("have" "had" "had")
-		 ("hear" "heard" "heard")
-		 ("hide" "hid" "hidden")
-		 ("hit" "hit" "hit")
-		 ("hold" "held" "held")
-		 ("hurt" "hurt" "hurt")
-		 ("keep" "kept" "kept")
-		 ("know" "knew" "known")
-		 ("lay" "laid" "laid")
-		 ("lead" "led" "led")
-		 ("learn" "learnt" "learnt")
-		 ("leave" "left" "left")
-		 ("lend" "lent" "lent")
-		 ("let" "let" "let")
-		 ("lie" "lay" "lain")
-		 ("light" "lit" "lit")
-		 ("lose" "lost" "lost")
-		 ("make" "made" "made")
-		 ("mean" "meant" "meant")
-		 ("meet" "met" "met")
-		 ("pay" "paid" "paid")
-		 ("put" "put" "put")
-		 ("read" "read" "read")
-		 ("ride" "rode" "ridden")
-		 ("ring" "rang" "rung")
-		 ("rise" "rose" "risen")
-		 ("run" "ran" "run")
-		 ("say" "said" "said")
-		 ("see" "saw" "seen")
-		 ("sell" "sold" "sold")
-		 ("send" "sent" "sent")
-		 ("set" "set" "set")
-		 ("shake" "shook" "shaken")
-		 ("shine" "shone" "shone")
-		 ("shoot" "shot" "shot")
-		 ("show" "showed" "shown")
-		 ("shut" "shut" "shut")
-		 ("sing" "sang" "sung")
-		 ("sink" "sank" "sunk")
-		 ("sit" "sat" "sat")
-		 ("sleep" "slept" "slept")
-		 ("smell" "smelt" "smelt")
-		 ("speak" "spoke" "spoken")
-		 ("spend" "spent" "spent")
-		 ("spill" "spelt" "spelt")
-		 ("spit" "spit" "spit")
-		 ("stand" "stood" "stood")
-		 ("steal" "stole" "stolen")
-		 ("swim" "swam" "swum")
-		 ("take" "took" "taken")
-		 ("teach" "taught" "taught")
-		 ("tear" "tore" "torn")
-		 ("tell" "told" "told")
-		 ("think" "thought" "thought")
-		 ("throw" "threw" "thrown")
-		 ("understand" "understood" "understood")
-		 ("wake" "woke" "woken")
-		 ("wear" "wore" "worn")
-		 ("win" "won" "won")
-		 ("write" "wrote" "written")))
+  (let ((learning-irregular-verbs-in-English--verbs '(
+						      ("beat" "beat" "beaten")
+						      ("become" "became" "become")
+						      ("begin" "began" "begun")
+						      ("bend" "bent" "bent")
+						      ("bet" "bet" "bet")
+						      ("bite" "bit" "bitten")
+						      ("bleed" "bled" "bled")
+						      ("blow" "blew" "blown")
+						      ("break" "broke" "broken")
+						      ("bring" "brought" "brought")
+						      ("build" "built" "built")
+						      ("burn" "burnt" "burnt")
+						      ("buy" "bought" "bought")
+						      ("catch" "caught" "caught")
+						      ("choose" "chose" "chosen")
+						      ("come" "came" "come")
+						      ("cost" "cost" "cost")
+						      ("cut" "cut" "cut")
+						      ("dig" "dug" "dug")
+						      ("do" "did" "done")
+						      ("draw" "drew" "drawn")
+						      ("dream" "dreamt" "dreamt")
+						      ("drink" "drank" "drunk")
+						      ("drive" "drove" "driven")
+						      ("eat" "ate" "eaten")
+						      ("fall" "fell" "fallen")
+						      ("feed" "fed" "fed")
+						      ("feel" "felt" "felt")
+						      ("fight" "fought" "fought")
+						      ("find" "found" "found")
+						      ("fly" "flew" "flown")
+						      ("forget" "forgot" "forgotten")
+						      ("forgive" "forgave" "forgiven")
+						      ("freeze" "froze" "frozen")
+						      ("get" "got" "got")
+						      ("give" "gave" "given")
+						      ("go" "went" "gone")
+						      ("grow" "grew" "grown")
+						      ("hang" "hung" "hung")
+						      ("have" "had" "had")
+						      ("hear" "heard" "heard")
+						      ("hide" "hid" "hidden")
+						      ("hit" "hit" "hit")
+						      ("hold" "held" "held")
+						      ("hurt" "hurt" "hurt")
+						      ("keep" "kept" "kept")
+						      ("know" "knew" "known")
+						      ("lay" "laid" "laid")
+						      ("lead" "led" "led")
+						      ("learn" "learnt" "learnt")
+						      ("leave" "left" "left")
+						      ("lend" "lent" "lent")
+						      ("let" "let" "let")
+						      ("lie" "lay" "lain")
+						      ("light" "lit" "lit")
+						      ("lose" "lost" "lost")
+						      ("make" "made" "made")
+						      ("mean" "meant" "meant")
+						      ("meet" "met" "met")
+						      ("pay" "paid" "paid")
+						      ("put" "put" "put")
+						      ("read" "read" "read")
+						      ("ride" "rode" "ridden")
+						      ("ring" "rang" "rung")
+						      ("rise" "rose" "risen")
+						      ("run" "ran" "run")
+						      ("say" "said" "said")
+						      ("see" "saw" "seen")
+						      ("sell" "sold" "sold")
+						      ("send" "sent" "sent")
+						      ("set" "set" "set")
+						      ("shake" "shook" "shaken")
+						      ("shine" "shone" "shone")
+						      ("shoot" "shot" "shot")
+						      ("show" "showed" "shown")
+						      ("shut" "shut" "shut")
+						      ("sing" "sang" "sung")
+						      ("sink" "sank" "sunk")
+						      ("sit" "sat" "sat")
+						      ("sleep" "slept" "slept")
+						      ("smell" "smelt" "smelt")
+						      ("speak" "spoke" "spoken")
+						      ("spend" "spent" "spent")
+						      ("spill" "spelt" "spelt")
+						      ("spit" "spit" "spit")
+						      ("stand" "stood" "stood")
+						      ("steal" "stole" "stolen")
+						      ("swim" "swam" "swum")
+						      ("take" "took" "taken")
+						      ("teach" "taught" "taught")
+						      ("tear" "tore" "torn")
+						      ("tell" "told" "told")
+						      ("think" "thought" "thought")
+						      ("throw" "threw" "thrown")
+						      ("understand" "understood" "understood")
+						      ("wake" "woke" "woken")
+						      ("wear" "wore" "worn")
+						      ("win" "won" "won")
+						      ("write" "wrote" "written")))
 	(buffer-name "*Learning irregular verbs in English*")
 	(state 1) ;; 1: start, 2: playing (before first check), 3: win (show success layout)
 	(verb-to-learn-infinitive nil)