None (82 words)
add, below, between, food, high, own, city, eyes, father, keep, last, never, school, trees, don't, few, left, light, story, thought, under, while, along, beginning, close, example, hard, might, next, seemed, something, always, both, got, group, life, often, paper, run, those, together, car, children, feet, important, miles, night, until, white, began, carry, four, grow, once, river, sea, state, enough, face, hear, idea, later, miss, second, stop, without, Indians, almost, far, girl, mountains, really, sometimes, watch, being, cut, family, it's, leave, soon, young, area
Once (18 words)
country, every, near, plants, earth, started, head, saw, open, side, walked, book, took, eat, above, list, song, talk