PROTOPAPAS

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apos apps arts atap atop oars oast oats oops oots opts orts osar papa paps para pars part past pats poop poor poos pops port post pots prao prat proa prop pros raps rapt rasp rato rats root rota roto rots soap soar soot sora sort spar spat spot star stoa stop taos tapa taps taro tarp tars topo tops tora toro tors trap trop tsar