TETRABASIC

aa ab ae ai ar as at ba be bi er es et is it re si ta ti

aas aba abs ace act air ais ait arb arc are ars art ate att baa bar bas bat bes bet bis bit bra cab car cat cis ear eat era ers eta ice ire its rai ras rat reb rec rei res ret ria rib sab sac sae sat sea sec sei ser set sib sic sir sit sri tab tae tar tas tat tea tet tic tie tis tit

abas abet abri aces acre acta acts airs airt aits arbs arcs area ares aria arse arts asci asea ates baas bait bare bars base bast bate bats batt bear beat best beta bets bias bice bier bise bite bits bitt brae bras brat brie bris brit cabs carb care cars cart casa case cast cate cats cire cist cite crab crib cris crit ears east eats eras erst etas etic ices ires isba race raia rais rase rate rats rebs recs reis rest rets rias ribs rice rise rite sabe sari sate sati scab scar scat sear seat sect sera seta sett sice sire site stab star stat stet stir tabs tace tact tare tars tart tate tats tear teas teat test tets tics tier ties tire tits tres tret tsar