5. (Masculine Singular) el muchacho (the boy) (Masculine Plural) (Feminine Singular) (Feminine Plural) la muchacha (the girl) los muchachos (the boys) las muchachas (the girls)
6. (Masculine Singular) un muchacho (a boy) (Masculine Plural) (Feminine Singular) (Feminine Plural) una muchacha (a girl) unos muchachos (some boys) unas muchachas (some girls)