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Answer
ar: amar, lavar, cepillar, andar, pensar, danzar, charlar, pasar, cazar, tratar.
er: beber, tener, leer, recoger, deber, hacer, meter, someter, romper,saber.
ir: ir, reír, salir, vivir, añadir, sacudir, decidir, lucir, morir, pulir, medir.
Explanation: