PROPAPIST

ai ar as at is it oi op or os pa pi si so ta ti to

air ais ait apo app apt ars art asp its oar oat ops opt ora ors ort pap par pas pat pia pip pis pit poi pop pot pro psi pst rai rap ras rat ria rip rot sap sat sip sir sit sop sot spa sri tao tap tar tas tip tis top tor

airs airt aits apos apps arts atop iota oars oast oats opts orts osar pair paps pars part past pats pias pips piso pita pits pois pops port post pots prao prat proa prop pros rais raps rapt rasp rato rats rias riot rips rota roti rots sari sati soap soar sora sori sort spar spat spit spot star stir stoa stop taos taps taro tarp tars tips tiro topi tops tora tori tors trap trio trip trop tsar