STRATIGRAPHIC

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aah aas act aga ags aha ahi ahs air ais ait apt arc ars art ash asp att cap car cat chi cig cis gap gar gas gat ghi gip git hag hap has hat hic hip his hit ich its pac pah par pas pat phi pht pia pic pig pis pit psi pst rag rah rai rap ras rat ria rig rip sac sag sap sat sha sic sip sir sit spa sri tag tap tar tas tat tic tip tis tit

aahs acta acts agar agas agha ahis airs airt aits arch arcs aria arts asci atap caph caps carp carr cars cart casa cash cast cats chai chap char chat chia chip chis chit cigs cist crag crap cris crit gait gaps gars gash gasp gast gats ghat ghis gips girt gist gits grat grip grit haar hags hair haps harp hart hasp hast hats hips hist hits ichs iris itch paca pacs pact pair para parr pars part pash past path pats phat phis pias pica pics pigs pish pita pith pits prat prig raga ragi rags raia rais raps rapt rash rasp rath rats rias rich rigs rips saga sari sati scag scar scat shag shat ship shit shri sigh sith spar spat spic spit stag star stat stir tach tact tags tahr tapa taps tarp tars tart tats that thir this tics tipi tips titi tits trap trig trip tsar