Each letter below is a hint to the name of a major world city - according to a certain pattern. Can you determine the pattern and name the cities? (#5 has two answers.)

1. F
2. N
3. I
4. C
5. E

HINT:
Wordplay is fair play.

Answers:

The names of the cities are:

Paris
Oslo
Rome
Ottawa
Cairo or London 

The pattern:

F is the capital (letter) of France, and Paris is the capital city - continuing with Norway, Italy, Canada, and Egypt or England.