### Instruction: You and your friends are discussing the best tier ratings of common London-based football teams. You are trying to determine whether Chelsea F.C., Arsenal F.C., Tottenham Hotspur F.C., West Ham United F.C., Fulham F.C. and Crystal Palace F.C. are considered by fans to be the 'best', 'ok' and 'worst'.
### Response: best: Tottenham Hotspur F.C.
ok: Chelsea F.C., West Ham United F.C., Fulham F.C. and Crystal Palace F.C.
worst: Arsenal F.C.