SUBFOSSORIAL

ab ai al ar as ba bi bo fa if is la li lo of oi or os si so us

abo abs ail air ais alb als arb arf ars ass bal bar bas bio bis boa boo bos bra bro bur bus fab far fas fib fil fir flu fob for fou fro fub fur ifs lab lar las lib lis lob loo oaf oar oba obi oil ora orb ors our rai ras ria rib rif rob rub sab sal sau sib sir sis sob sol sos sou sri sub urb

abos abri ails airs albs alif also arbs arfs aril bail bals barf bars bass bias bios birl biro blur boar boas boil bola bolo boor boos bora boss bras brio bris broo bros bura burl burs buss fabs fail fair farl faro fiar fibs fila filo fils firs flab flir flub flus foal fobs foil fool fora forb foss foul four fubs furl furs fuss isba labs lair lari lars lass liar libs lira loaf lobo lobs loof loos loss lour oafs oars obas obia obis obol oils olio oral orbs osar ossa ours rail rais rial rias ribs rifs robs roil rolf roof rubs sabs sail sals sari sass saul sial sibs silo sirs slab slob slub slur soar soba sobs sofa soil sola soli solo sols sora sorb sori soul sour sous sris suba subs sura surf suss urbs ursa