In this kata you will be given a random string of letters and tasked with returning them as a string of comma-separated sequences sorted alphabetically, with each sequence starting with an uppercase character followed by `n-1` lowercase characters, where `n` is the letter's alphabet position `1-26`.
## Example
```python
alpha_seq("ZpglnRxqenU") -> "Eeeee,Ggggggg,Llllllllllll,Nnnnnnnnnnnnnn,Nnnnnnnnnnnnnn,Pppppppppppppppp,Qqqqqqqqqqqqqqqqq,Rrrrrrrrrrrrrrrrrr,Uuuuuuuuuuuuuuuuuuuuu,Xxxxxxxxxxxxxxxxxxxxxxxx,Zzzzzzzzzzzzzzzzzzzzzzzzzz"
```
## Technical Details
- The string will include only letters.
- The first letter of each sequence is uppercase followed by `n-1` lowercase.
- Each sequence is separated with a comma.
- Return value needs to be a string.
def alpha_seq(string):
    o = ord("a") -1
    return ",".join((c * (ord(c) - o)).capitalize() for c in sorted(string.lower()))
def alpha_seq(string):
    o = ord("a") -1
    return ",".join((c * (ord(c) - o)).capitalize() for c in sorted(string.lower()))