W13-1 Coach Manager: Invalid information for student unaccounted for

[nus-pe-bot]

When typing random input without commas upon being prompted for name, age and address for a new student to be added, an exception is raised that terminates Coach Manager.

Steps to reproduce the bug:

1. Enter '2' to Manage Students.
2. Enter 'add' to add a new student.
3. Enter random input without commas.

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_{[original: hin1/ped#5]}