PROTAXIS

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

air ais ait apo apt ars art asp its oar oat ops opt ora ors ort par pas pat pax pia pis pit pix poi pot pox pro psi pst rai rap ras rat rax ria rip rot sap sat sax sip sir sit six sop sot sox spa sri tao tap tar tas tax tip tis top tor xis

airs airt aits apos arts atop axis iota oars oast oats opts orts osar pair pars part past pats pias piso pita pits pois port post pots prao prat proa 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 taxi tips tiro topi tops tora tori tors trap trio trip trop tsar