OBSTRUCTIONIST

bi bo in is it no nu oi on or os si so ti to un us ut

bin bio bis bit boo bos bot bro bun bur bus but cis cob con coo cor cos cot cru cub cur cut ins ion its nib nit nob noo nor nos not nub nus nut obi ono ons oot orb orc ors ort our out rib rin rob roc rot rub run rut sib sic sin sir sis sit sob son sos sot sou sri sub sun tic tin tis tit ton too tor tot tub tui tun tut uns urb urn uts

bins bint bios biro bits bitt boon boor boos boot born bort boss bots bott bout brin brio bris brit broo bros brut buns bunt burn burs buss bust buts butt cion cist cobs coin coir coni cons coon coos coot corn cors coss cost cots crib cris crit crus cubs cunt curb curn curs curt cuss cuts ibis icon inro inti into ions iris iron nibs nisi nits nobs noir nori nous nubs nuts obis obit onos onto onus oots orbs orcs orts otic otto ours oust outs ribs rins riot robs rocs root roti roto rots rout rubs ruin runs runt rust ruts scot scut sibs sics sins sirs sits snib snit snob snot snub sobs sons soon soot sorb sori sorn sort sots sour sous sris stir stob stot stub stun subs suit suns tics tins tint tiro titi tits toit tons toon toot torc tori torn toro tors tort toss tost tots tour tout trio trot tubs tuis tuns turn tuts unci unco unit unto urbs uric urns