Some potential usernames for "Jamie" based on the specified parameters could be: 
1. JamLoverJ
2. Jamiestar
3. JaymeFun8
4. JamsRockin
5. Jamiexy12.
Name: Jamie
Parameters: Must contain the letter J and must be between 8-12 characters.
### Instruction:
Generate a username for a given person with specific parameters.

### Input:
Name: Jamie
Parameters: Must contain the letter J and must be between 8-12 characters.

### Response:
