diff --git a/aufgaben/src/Pflichtuebung_01/Pu01.elm b/aufgaben/src/Pflichtuebung_01/Pu01.elm
index 7dfeb91..4aee1c2 100644
--- a/aufgaben/src/Pflichtuebung_01/Pu01.elm
+++ b/aufgaben/src/Pflichtuebung_01/Pu01.elm
@@ -17,11 +17,11 @@ type alias Date =
 
 -- 1 Punkt:
 year : Date -> Year
---year (a, b, c) = c
+year (a,b,c) = c
 month : Date -> Month
---month (a,b,c) = b
+month (a,b,c) = b
 day : Date -> Day
---day (a,b , c) = a
+day (a,b,c) = a
 
 -- 1 Punkt:
 lt : Date -> Date -> Bool
@@ -30,6 +30,14 @@ gt : Date -> Date -> Bool
 
 -- 1 Punkt:
 toString : Date -> String
+toString (a,b,c) = (if a < 10 then "0" ++ String.fromInt(a) else String.fromInt(a))
+                    ++ (if b < 10 then "0" ++ String.fromInt(b) else String.fromInt(b))
+                    ++ (if c < 10 then  "000" ++ String.fromInt(c)
+                    else if c < 100 then  "00" ++ String.fromInt(c)
+                    else if   c < 1000 then  "0" ++ String.fromInt(c)
+                    else String.fromInt(c))
+-- TT.MM.YYYY
+
 
 -- 2 Punkte:
 next : Date -> Date