UPBRAST

ab ar as at ba pa ta up us ut

abs apt arb ars art asp bap bar bas bat bra bur bus but par pas pat pst pub pur pus put rap ras rat rub rut sab sap sat sau spa sub sup tab tap tar tas tau tub tup ups urb urp uta uts

abut arbs arts baps bars bast bats bras brat brut bura burp burs bust buts pars part past pats prat prau pubs purs puts raps rapt rasp rats rubs rust ruts spar spat spur stab star stub suba sura tabs tabu taps tarp tars taus trap tsar tuba tubs tups upas urbs urps ursa utas