Implement pluralize(word, count=2) returning word unchanged when count == 1 and the plural otherwise, using these rules in order:
person→people, child→children, mouse→mice, man→men, woman→women, tooth→teeth, foot→feetsheep, fish, series, species, data, informations, x, z, ch, sh → add esy → iesfe → ves; ends in f (except roof, belief, chef) → vessPreserve the case of the first letter (Child → Children). Also implement format_count(n, word) → "1 file", "3 files".