SWAPTION

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 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 sit son sop 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 atop awns into ions iota naoi naos naps nipa nips nits nota nows nowt oast oats opts owns pain pans pant past pats pawn paws pian pias pina pins pint pion piso pita pits pois pons post pots pows sain sati sawn snap snaw snip snit snot snow soap sown span spat spin spit spot staw stoa stop stow swan swap swat swop swot tain tans taos taps taws tins tips tons topi tops town tows twas twin twos wain wait wans want waps wasp wast wats wino wins wisp wist wits wons wont wops wost wots