parts — a portion or division of a whole that is separate or distinct; piece, fragment, fraction, or section; constituent: the rear part of the house; to glue the two parts together.
letters — a person who lets, especially one who rents out property.
ones — being or amounting to a single unit or individual or entire thing, item, or object rather than two or more; a single: one woman; one nation; one piece of cake.
insides — on the inner side or part of; within: inside the circle; inside the envelope.