SUBTRACTOR

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abo abs act arb arc ars art att bar bas bat boa bos bot bra bro brr bur bus but cab car cat cob cor cos cot cru cub cur cut oar oat oba oca ora orb orc ors ort our out ras rat rob roc rot rub rut sab sac sat sau sob sot sou sub tab tao tar tas tat tau tor tot tub tut urb uta uts

abos abut acts arbs arco arcs arts auto bars bast bats batt boar boas boat bora bort bota bots bott bout bras brat bros brut bura burr burs bust buts butt cabs carb carr cars cart cast cats coat cobs cors cost cots crab crus cubs curb curr curs curt cuts oars oast oats obas ocas orbs orca orcs orra orts osar ours oust outs rato rats roar robs rocs rota rots rout rubs rust ruts scab scar scat scot scut soar soba soca sora sorb sort sour stab star stat stoa stob stot stub suba sura tabs tabu taco tact taos taro tars tart tats taus taut tora torc torr tors tort tost tots tour tout trot tsar tuba tubs tuts urbs ursa utas