8.2. In a fairy-tale country, every piglet either always lies or always tells the truth, and each piglet reliably knows whether every other piglet is a liar. One day, Nif-Nif, Naf-Naf, and Nuf-Nuf met for a cup of tea, and two of them made statements, but it is unknown who exactly said what. One of the three piglets said: “Nif-Nif and Naf-Naf both always lie.” Another said: “Nif-Nif and Nuf-Nuf both always lie.” Determine how many liars are among the three piglets.