SUBTOPIA

ab ai as at ba bi bo is it oi op os pa pi si so ta ti to up us ut

abo abs ais ait apo apt asp bap bas bat bio bis bit boa bop bos bot bus but its oat oba obi ops opt out pas pat pia pis pit piu poi pot psi pst pub pus put sab sap sat sau sib sip sit sob sop sot sou spa sub sup tab tao tap tas tau tip tis top tub tui tup upo ups uta uts

abos abut aits apos atop auto bait baps bast bats bias bios bits boas boat bops bota bots bout bust buts iota isba oast oats obas obia obis obit opts opus oust outs past pats pias piso pita pits pois post pots pout ptui pubs puts sati soap soba soup spat spit spot stab stoa stob stop stub suba suit tabs tabu taos taps taus tips topi tops tuba tubs tuis tups upas utas