BIOSTRATIGRAPHY

aa ab ag ah ai ar as at ay ba bi bo by go ha hi ho is it oh oi op or os oy pa pi sh si so ta ti to ya yo

aah aas aba abo abs aby aga ago ags aha ahi ahs air ais ait apo apt arb ars art ash asp att ays baa bag bah bap bar bas bat bay big bio bis bit boa bog bop bos bot boy bra bro brr bys gab gap gar gas gat gay ghi gib gip git goa gob gor gos got goy gyp hag hao hap has hat hay hip his hit hob hog hop hos hot hoy hyp its oar oat oba obi ohs ops opt ora orb ors ort pah par pas pat pay phi pht pia pig pis pit poh poi pot pro pry psi pst pya rag rah rai rap ras rat ray rho ria rib rig rip rob rot rya sab sag sap sat say sha shy sib sip sir sit sob sop sot soy spa spy sri sty tab tag tao tap tar tas tat tho thy tip tis tit tog top tor tot toy try yag yah yap yar yip yob

aahs abas abos abri abys agar agas agha agio ahis ahoy airs airt airy aits apos arbs aria arts arty ashy atap atop ayah baas bags baht bait baps bars bash bast bath bats batt bays bias bigs biog bios biro birr bits bitt boar boas boat bogs bogy bops bora bort bosh bota both bots bott boys brag bras brat bray brig brio bris brit bros gabs gaby gait gaps gapy garb gars gash gasp gast gats gays ghat ghis gibs gips giro girt gist gits goas goat gobs goby gorp gory gosh goth goys grab grat gray grip grit grot gyps gyri gyro haar hags hair haps harp hart hasp hast hats hays hips hist hits hoar hobs hogs hops hora host hots hoya hoys hypo hyps ibis iota iris isba oars oast oath oats obas obia obis obit ohia opah opts orbs orby orgy orra orts osar pair para parr pars part pash past path pats paty pays phat phis phot pias pigs pish piso pita pith pits pity pogy pois port posh post posy pots prao prat pray prig proa prog pros pyas pyro raga ragi rags raia rais raps rapt rash rasp rath rato rats raya rays rhos rias ribs rigs riot rips roar robs ropy rosy rota roti rots ryas ryot saga sago sagy sari sati shag shat shay ship shit shog shop shot shri sigh sith soap soar soba soph sora sorb sori sort soth soya spar spat spay spit spot spry stab stag star stat stay stir stoa stob stop stot sybo syph tabs tags tahr taos tapa taps taro tarp tars tart tats that thio thir this thro tipi tips tiro titi tits toby toga togs toit toph topi tops tora tori torr tors tort tory tosh tost tots toys trap tray trig trio trip trog trop trot troy tsar typo tyro yagi yags yaps yips yirr yobs yoga yogh yogi