SUBSTITUTIONARY

ab ai an ar as at ay ba bi bo by in is it na no nu oi on or os oy si so ta ti to un us ut ya yo

abo abs aby ain air ais ait ani ant any arb ars art ass att ays ban bar bas bat bay bin bio bis bit boa bos bot boy bra bro bun bur bus but buy bys ins ion its nab nay nib nit nob nor nos not nub nus nut oar oat oba obi ons ora orb ors ort our out rai ran ras rat ray ria rib rin rob rot rub run rut rya sab sat sau say sib sin sir sis sit sob son sos sot sou soy sri sty sub sun syn tab tan tao tar tas tat tau tin tis tit ton tor tot toy try tub tui tun tut uns urb urn uta uts yar yin yob yon you

abos abri abut abys ains airn airs airt airy aits anis anti ants anus arbs arts arty aunt auto ayin bait bani bans barn bars bass bast bats batt bays bias bins bint bios biro bits bitt boar boas boat bony bora born bort boss bota bots bott bout boys bran bras brat bray brin brio bris brit bros brut buna buns bunt buoy bura burn burs bury buss bust busy buts butt buys ibis inby inia inro inti into ions iota iris iron isba nabs naoi naos nary nays nibs nisi nits nobs noir nori nosy nota nous nubs nuts oars oast oats obas obia obis obit onus orbs orby orts osar ossa ours oust outs rain rais rani rant rato rats rays rias ribs rins riot roan robs rosy rota roti rots rout rubs ruby ruin runs runt rust ruts ryas ryot sabs sain sans sari sati says sibs sins sirs sits snib snit snob snot snub soar soba sobs sons sora sorb sori sorn sort sots sour sous soya soys sris stab star stat stay stir stoa stob stot stub stun suba subs suit suns sura sybo tabs tabu tain tans taos tarn taro tars tart tass tats taus taut tins tint tiny tiro titi tits toby toit tons tony tora tori torn tors tort tory toss tost tots tour tout toys tray trio trot troy tsar tuba tubs tuis tuna tuns turn tuts tutu tyin tyro unai unau unit unto urbs urns ursa urus utas yarn yins yobs yoni your yous yuan yurt