SWAPTIONS

ai an as at aw in is it na no oi on op os ow pa pi si so ta ti to wo

ain ais ait ani ant apo apt asp ass awn ins ion its nap naw nip nit nos not now oat ons ops opt own pan pas pat paw pia pin pis pit poi pot pow psi pst sap sat saw sin sip sis sit son sop sos sot sow spa tan tao tap tas taw tin tip tis ton top tow twa two wan wap was wat win wis wit won wop wos wot

ains aits anis anti ants apos asps atop awns into ions iota naoi naos naps nipa nips nits nota nows nowt oast oats opts ossa owns pain pans pant pass past pats pawn paws pian pias pina pins pint pion piso piss pita pits pois pons post pots pows psis psst sain sans saps sati sawn saws sins sips sits snap snaw snip snit snot snow soap sons sops sots sown sows span spas spat spin spit spot staw stoa stop stow swan swap swat swop swot tain tans taos taps tass taws tins tips tons topi tops toss town tows twas twin twos wain wait wans want waps wasp wast wats wino wins wisp wiss wist wits wons wont wops wost wots