TOPOGNOSIS

go in is it no oi on op os pi si so ti to

gin gip git goo gos got ins ion its nip nit nog noo nos not ono ons oot ops opt pig pin pis pit poi poo pot psi pst sin sip sis sit son sop sos sot tin tip tis tog ton too top

gins gips gist gits goon goop goos into ions nips nits nogs onos onto oops oots opts pigs ping pins pint pion piso piss pits pois pong pons poon poos post pots psis psst sign sing sins sips sits snip snit snog snot song sons soon soot sops sots spin spit spot stop ting tins tips togs tong tons toon topi topo tops toss