Updated README

Author: imKashyap

Hackerrank/Regex/README.md

@@ -11,6 +11,18 @@
 |Matching White Space & Non-White Space Characters|[Problem](https://www.hackerrank.com/challenges/matching-whitespace-non-whitespace-character/problem)|java|[Solution](./Introduction/MatchingDigitsNonDigitChar.java)|
 **Character Class**|||
 |Matching Specific Characters|[Problem](https://www.hackerrank.com/challenges/matching-specific-characters/problem)|java|[Solution](./Character%20Class/MatchingSpecificChar.java)|
+|Excluding Specific Characters|[Problem](https://www.hackerrank.com/challenges/excluding-specific-characters/problem)|java|[Solution](./Character%20Class/ExcludingSpecificChar.java)|
+|Matching Character Ranges|[Problem](https://www.hackerrank.com/challenges/matching-range-of-characters/problem)|java|[Solution](./Character%20Class/MatchingCharRanges.java)|
+**Repetitions**|||
+|Matching {x} Repetitions|[Problem](https://www.hackerrank.com/challenges/matching-x-repetitions/problem)|java|[Solution](./Repetitions/MatchingXReps.java)|
+|Matching {x,y} Repetitions|[Problem](https://www.hackerrank.com/challenges/matching-x-y-repetitions/problem)|java|[Solution](./Repetitions/MatchingXYReps.java)|
+|Matching Zero or more Repetitions|[Problem](https://www.hackerrank.com/challenges/matching-zero-or-more-repetitions/problem)|java|[Solution](./Repetitions/MatchingZeroOrMoreReps.java)|
+|Matching One or more Repetitions|[Problem](https://www.hackerrank.com/challenges/matching-one-or-more-repititions/problem)|java|[Solution](./Repetitions/MatchingOneOrMoreReps.java)|
+|Matching Ending Items|[Problem](https://www.hackerrank.com/challenges/matching-ending-items/problem)|java|[Solution](./Repetitions/MatchingEndingItems.java)|
+**Grouping & Capturing**|||
+|Matching Word Boundaries|[Problem](https://www.hackerrank.com/challenges/matching-word-boundaries/problem)|java|[Solution](./Grouping%20&%20Capturing/MatchingWordBound.java)|
+|Capturing & Non-Capturing Groups|[Problem](https://www.hackerrank.com/challenges/capturing-non-capturing-groups/problem)|java|[Solution](./Grouping%20&%20Capturing/Capturing-Non-CapturingGroups.java)|
+|Alternative Matching|[Problem](https://www.hackerrank.com/challenges/alternative-matching/problem)|java|[Solution](./Grouping%20&%20Capturing/AlternativeMatch.java)|
 **Applications**|||
 |Find A Sub-Word|[Problem](https://www.hackerrank.com/challenges/find-substring/problem)|java|[Solution](./Applications/FindASubWord.java)|
 Alien Username|[Problem](https://www.hackerrank.com/challenges/alien-username/problem)|java|[Solution](./Applications/AlienUsername.java)|