PETROGRAPH

ae ag ah ar at eh er et go ha he ho oe oh op or pa pe re ta to

age ago ape apo app apt are art ate ear eat ego era erg err eta eth gae gap gar gat get goa gor got hae hag hao hap hat hep her het hoe hog hop hot oar oat ope opt ora ore ort pah pap par pat pea peg peh pep per pet pht poh pop pot pro rag rah rap rat reg rep ret rho roe rot tae tag tao tap tar tea teg the tho toe tog top tor

aero ager aper atop eath epha ergo gape gate gear geta ghat goat goer gore gorp goth grat grot haet hare harp hart hate heap hear heat hero hoar hoer hope hora oath ogre opah orra page pare parr part pate path peag pear peat pepo perp pert phat phot poet pope pore port prao prat prep proa prog prop rage rape rapt rare rate rath rato reap rear repo repp rhea roar rope rota rote tahr tape tare taro tarp tear tepa thae thro toea toga tope toph tora tore torr trap trog trop