Add version with parsing

I found this highly unnecessary but whatever

2019/day4/day4_withparse.hs

@@ -0,0 +1,17 @@
+import Data.List
+import Data.List.Split
+
+main = do
+    print (day4 p $ range "130254-678275")
+    print (day4 p' $ range "130254-678275")
+
+range :: String -> [Int]
+range input = [a..b] where [a,b] = map read $ splitOn "-" input
+
+day4 p = sum . map (fromEnum . p . show)
+
+p x | sort x /= x = False
+    | nub x == x = False
+    | otherwise = True
+
+p' x = 2 `elem` (map length $ group x) && p x