| Title | Solution | Difficulty |
|---|---|---|
| Matrix Script | Python | Easy |
| Validating Postal Codes | Python | Difficult |
| Validating Credit Card Numbers | Python | Moderate |
| Validating UID | Python | Easy |
| Detect HTML tags, attributes and attribute values | Python | Easy |
| HTML Parser - Part 2 | Python | Easy |
| HTML Parser - Part 1 | Python | Easy |
| Hex Color Code | Python | Easy |
| Validating Roman Numerals | Python | Easy |
| Validating & Parsing Email Addresses | Python | Easy |
| Validating phone numbers | Python | Easy |
| Regex Substitution | Python | Moderate |
| Re.start() & Re.end() | Python | Easy |
| re.findall() & re.finditer() | Python | Easy |
| group(), groups() & groupdict() | Python | Easy |
| re.split() | Python | Easy |
| Introduction to re module | Python | Easy |