Here are the details for the bus services you mentioned:
Bus Service: 104A
- Departure from Trichy : 21:35:00 PM
- Arrival at Thiruvarur: 1:30:00 AM
- Type: Express (EXP)
- Operator: TNSTC-KUM
Bus Service: 427B
- Departure from Trichy : 19:53:00 PM
- Arrival at Thiruvarur: 23:10:00 PM
- Type: Express (EXP)
- Operator: TNSTC-KUM