PARASITOSIS

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

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

airs airt aits apos aria arts asps atap atop iota iris oars oast oats opts orts osar ossa pair para pars part pass past pats pias piso piss pita pits pois port post pots prao prat proa pros psis psst raia rais raps rapt rasp rato rats rias riot rips rota roti rots saps sari sass sati sips sirs sits soap soar sops sora sori sort sots spar spas spat spit spot sris star stir stoa stop taos tapa taps taro tarp tars tass tipi tips tiro topi tops tora tori tors toss trap trio trip trop tsar