SUBCULTURING

bi in is it li nu si ti un us ut

big bin bis bit bug bun bur bus but cig cis cru cub cur cut gib gin git gnu gul gun gut ins its lib lin lis lit lug nib nil nit nub nus nut rib rig rin rub rug run rut sib sic sin sir sit sri sub sun tic til tin tis tub tug tui tun ulu uns urb urn uts

bigs bins bint birl bits blin blur brig brin bris brit brut bugs bung buns bunt burg burl burn burs bust buts cigs cist club crib cris crit crus cubs cult cunt curb curl curn curs curt cuts gibs gilt gins girl girn girt gist gits glib glut gnus grin grit grub guls guns guru gust guts iglu libs ling lins lint list lits litu lugs lung lunt lust nibs nils nits nubs nurl nuts ribs rigs ring rins rubs rugs ruin rung runs runt rust ruts scut sign silt sing slit slub slug slur slut snib snit snub snug stir stub stun suit sulu sung tics tils ting tins tirl trig trug tubs tugs tuis tung tuns turn ulus unci unit urbs uric urns urus