a letter, and ignorance is darkness, apple, background, beau, blonde, book, books, bristles, camera, card, compass, cup, detectives, eye, face, guitar, guy, hat, high, humor, jacket, kitten, logo, look, magnifier, mathematics, music, musician, necktie, network, notebook, office, old age, pen, pencil, people, picture, pictures, portrait, resistance of materials, room, singer, slide rule, smile, sopromat, stiletto, suitcase, surprised, teaching light, teeth, termehu, the rolling stones, theoretical mechanics, traces, view, wallpaper., watches, watching the detectives, white, wrinkles