BISCUITROOT

bi bo is it oi or os si so ti to us ut

bio bis bit boo bos bot bro bur bus but cis cob coo cor cos cot cru cub cur cut its obi oot orb orc ors ort our out rib rob roc rot rub rut sib sic sir sit sob sot sou sri sub tic tis tit too tor tot tub tui tut urb uts

bios biro bits bitt boor boos boot bort bots bott bout brio bris brit broo bros brut burs bust buts butt cist cobs coir coos coot cors cost cots crib cris crit crus cubs curb curs curt cuts ibis iris obis obit oots orbs orcs orts otic otto ours oust outs ribs riot robs rocs root roti roto rots rout rubs rust ruts scot scut soot sorb sori sort sour stir stob stot stub suit tics tiro titi tits toit toot torc tori toro tors tort tost tots tour tout trio trot tubs tuis tuts urbs uric