On the plural form at the end of the English word (noun) f, Some English words (nouns) end with F, but in the plural form, we should not only change f into V and add es, but also remove the first (or last) letter of F. please list 3-5 such words and give explanations. Give points according to the answers! ╭╗ ╔╮ ╭╗ ╔╮╭╦═ ╗╮ ╔═╠═║║╔═╠═║║ ║ ║╝ ╔═╠═║╝╔═╠═║╝╚╠══╠╝ ╔═╠═╠╝╔═╠═╠╝ ║ ║║ ╔══╠╩╗╔══╠╩╗╰╠╝╔╠╯ ╚╝ ╝╚╯╚╝ ╝╚╯╚╯ ╯╰╝

Leaf leaves scarf scarves / scarfs handkerchief handkerchiefs knife thiefs life lives self lives self lives self lives