This is simple Finite automata implementation which comes with the problem statement of a form having an email input field that-
- Must end with @diu.edu.bd
- Username shouldn't include {. , @)
- Username formate is like: name00-0000 || name00-0 || name 00-00000000
- Username can't have more that one '-' and the position of '-' should be the 3rd position from the first numeric after extracting alphabets