We declare that the work we have submitted for Stage <?> of this
assignment and all stages before it is entirely our own work, with the
following documented exceptions:

- The idea of using <...> to make the game run faster came from a
  discussion with <...> (noted in source code comments)

- The code in class <...> is based on a solution we found when
  researching the problem (URL provided in source code comments)

- ....

Signed: Mary Jones (u2345678), Bob Smith (u1234567), and Sue Black (u3456789)