diff --git a/DIRECTORY.md b/DIRECTORY.md
index b28c078..72b0615 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -1,94 +1,86 @@
 # List of all files
 
 ## Ciphers
-
-- [Caesarcipher](./Ciphers/CaesarCipher.php)
-- [Monoalphabeticcipher](./Ciphers/MonoAlphabeticCipher.php)
-- [Morsecode](./Ciphers/MorseCode.php)
-- [Xorcipher](./Ciphers/XORCipher.php)
+  * [Caesarcipher](./Ciphers/CaesarCipher.php)
+  * [Monoalphabeticcipher](./Ciphers/MonoAlphabeticCipher.php)
+  * [Morsecode](./Ciphers/MorseCode.php)
+  * [Xorcipher](./Ciphers/XORCipher.php)
 
 ## Conversions
-
-- [Binarytodecimal](./Conversions/BinaryToDecimal.php)
-- [Decimaltobinary](./Conversions/DecimalToBinary.php)
-- [Hexadecimaltodecimal](./Conversions/HexadecimalToDecimal.php)
-- [Octaltodecimal](./Conversions/OctalToDecimal.php)
+  * [Binarytodecimal](./Conversions/BinaryToDecimal.php)
+  * [Decimaltobinary](./Conversions/DecimalToBinary.php)
+  * [Hexadecimaltodecimal](./Conversions/HexadecimalToDecimal.php)
+  * [Octaltodecimal](./Conversions/OctalToDecimal.php)
 
 ## Maths
-
-- [Absolutemax](./Maths/AbsoluteMax.php)
-- [Absolutemin](./Maths/AbsoluteMin.php)
-- [Checkprime](./Maths/CheckPrime.php)
-- [Factorial](./Maths/Factorial.php)
-- [Fastexponentiation](./Maths/FastExponentiation.php)
-- [Fibonacci](./Maths/Fibonacci.php)
-- [Fibonacci2](./Maths/Fibonacci2.php)
-- [Perfectsquare](./Maths/PerfectSquare.php)
-- Projecteuler
-  - [Problem1](./Maths/ProjectEuler/Problem1.php)
-  - [Problem2](./Maths/ProjectEuler/Problem2.php)
-  - [Problem3](./Maths/ProjectEuler/Problem3.php)
-  - [Problem5](./Maths/ProjectEuler/Problem5.php)
-  - [Problem6](./Maths/ProjectEuler/Problem6.php)
-  - [Problem7](./Maths/ProjectEuler/Problem7.php)
-  - [Problem9](./Maths/ProjectEuler/Problem9.php)
+  * [Absolutemax](./Maths/AbsoluteMax.php)
+  * [Absolutemin](./Maths/AbsoluteMin.php)
+  * [Checkprime](./Maths/CheckPrime.php)
+  * [Factorial](./Maths/Factorial.php)
+  * [Fastexponentiation](./Maths/FastExponentiation.php)
+  * [Fibonacci](./Maths/Fibonacci.php)
+  * [Fibonacci2](./Maths/Fibonacci2.php)
+  * [Perfectsquare](./Maths/PerfectSquare.php)
+  * Projecteuler
+    * [Problem1](./Maths/ProjectEuler/Problem1.php)
+    * [Problem2](./Maths/ProjectEuler/Problem2.php)
+    * [Problem3](./Maths/ProjectEuler/Problem3.php)
+    * [Problem5](./Maths/ProjectEuler/Problem5.php)
+    * [Problem6](./Maths/ProjectEuler/Problem6.php)
+    * [Problem7](./Maths/ProjectEuler/Problem7.php)
+    * [Problem9](./Maths/ProjectEuler/Problem9.php)
 
 ## Searches
-
-- [Binarysearch](./Searches/BinarySearch.php)
-- [Fibonaccisearch](./Searches/FibonacciSearch.php)
-- [Jumpsearch](./Searches/JumpSearch.php)
-- [Linearsearch](./Searches/LinearSearch.php)
-- [Lowerbound](./Searches/LowerBound.php)
-- [Upperbound](./Searches/UpperBound.php)
+  * [Binarysearch](./Searches/BinarySearch.php)
+  * [Fibonaccisearch](./Searches/FibonacciSearch.php)
+  * [Jumpsearch](./Searches/JumpSearch.php)
+  * [Linearsearch](./Searches/LinearSearch.php)
+  * [Lowerbound](./Searches/LowerBound.php)
+  * [Upperbound](./Searches/UpperBound.php)
 
 ## Sorting
-
-- [Arraykeyssort](./Sorting/ArrayKeysSort.php)
-- [Bubblesort](./Sorting/BubbleSort.php)
-- [Bubblesort2](./Sorting/BubbleSort2.php)
-- [Countsort](./Sorting/CountSort.php)
-- [Gnomesort](./Sorting/GnomeSort.php)
-- [Insertionsort](./Sorting/InsertionSort.php)
-- [Mergesort](./Sorting/MergeSort.php)
-- [Quicksort](./Sorting/QuickSort.php)
-- [Radixsort](./Sorting/RadixSort.php)
-- [Selectionsort](./Sorting/SelectionSort.php)
+  * [Arraykeyssort](./Sorting/ArrayKeysSort.php)
+  * [Bubblesort](./Sorting/BubbleSort.php)
+  * [Bubblesort2](./Sorting/BubbleSort2.php)
+  * [Countsort](./Sorting/CountSort.php)
+  * [Gnomesort](./Sorting/GnomeSort.php)
+  * [Insertionsort](./Sorting/InsertionSort.php)
+  * [Mergesort](./Sorting/MergeSort.php)
+  * [Quicksort](./Sorting/QuickSort.php)
+  * [Radixsort](./Sorting/RadixSort.php)
+  * [Selectionsort](./Sorting/SelectionSort.php)
 
 ## Strings
-
-- [Checkanagram](./Strings/CheckAnagram.php)
-- [Checkpalindrome](./Strings/CheckPalindrome.php)
-- [Checkpalindrome2](./Strings/CheckPalindrome2.php)
-- [Countconsonants](./Strings/CountConsonants.php)
-- [Countsentences](./Strings/CountSentences.php)
-- [Countvowels](./Strings/CountVowels.php)
-- [Distance](./Strings/Distance.php)
-- [Maxcharacter](./Strings/MaxCharacter.php)
-- [Reversestring](./Strings/ReverseString.php)
-- [Reversewords](./Strings/ReverseWords.php)
+  * [Checkanagram](./Strings/CheckAnagram.php)
+  * [Checkpalindrome](./Strings/CheckPalindrome.php)
+  * [Checkpalindrome2](./Strings/CheckPalindrome2.php)
+  * [Countconsonants](./Strings/CountConsonants.php)
+  * [Countsentences](./Strings/CountSentences.php)
+  * [Countvowels](./Strings/CountVowels.php)
+  * [Distance](./Strings/Distance.php)
+  * [Maxcharacter](./Strings/MaxCharacter.php)
+  * [Reversestring](./Strings/ReverseString.php)
+  * [Reversewords](./Strings/ReverseWords.php)
 
 ## Tests
-
-- Ciphers
-  - [Cipherstest](./tests/Ciphers/CiphersTest.php)
-  - [Monoalphabeticciphertest](./tests/Ciphers/MonoAlphabeticCipherTest.php)
-  - [Morsecodetest](./tests/Ciphers/MorseCodeTest.php)
-- Conversions
-  - [Conversionstest](./tests/Conversions/ConversionsTest.php)
-- Maths
-  - [Mathstest](./tests/Maths/MathsTest.php)
-  - [Projecteulertest](./tests/Maths/ProjectEulerTest.php)
-- Searches
-  - [Searchestest](./tests/Searches/SearchesTest.php)
-- Sorting
-  - [Arraykeyssorttest](./tests/Sorting/ArrayKeysSortTest.php)
-  - [Gnomesorttest](./tests/Sorting/GnomeSortTest.php)
-  - [Sortingtests](./tests/Sorting/SortingTests.php)
-- Strings
-  - [Stringstest](./tests/Strings/StringsTest.php)
+  * Ciphers
+    * [Cipherstest](./tests/Ciphers/CiphersTest.php)
+    * [Monoalphabeticciphertest](./tests/Ciphers/MonoAlphabeticCipherTest.php)
+    * [Morsecodetest](./tests/Ciphers/MorseCodeTest.php)
+  * Conversions
+    * [Conversionstest](./tests/Conversions/ConversionsTest.php)
+  * Maths
+    * [Mathstest](./tests/Maths/MathsTest.php)
+    * [Projecteulertest](./tests/Maths/ProjectEulerTest.php)
+  * Searches
+    * [Searchestest](./tests/Searches/SearchesTest.php)
+  * Sorting
+    * [Arraykeyssorttest](./tests/Sorting/ArrayKeysSortTest.php)
+    * [Gnomesorttest](./tests/Sorting/GnomeSortTest.php)
+    * [Sortingtests](./tests/Sorting/SortingTests.php)
+  * Strings
+    * [Stringstest](./tests/Strings/StringsTest.php)
 
 ## Utils
-
-- [Arrayhelpers](./Utils/ArrayHelpers.php)
-- [Executiontime](./Utils/ExecutionTime.php)
+  * [Arrayhelpers](./Utils/ArrayHelpers.php)
+  * [Executiontime](./Utils/ExecutionTime.php)