-al -ol a-a a-b a-t aaa aab aal aao aap aat ab- aba abb abl abo abp abt al- ala alb all alo alp alt aoa aob aol aoo aop aot ap- apa apb apl apo app apt at- ata atb atl ato atp att b-p baa bab bal bao bap bat bba bbb bbl bbo bbp bbt bla blb bll blo blp blt boa bob bol boo bop bot bpa bpb bpl bpo bpp bpt bta btb btl bto btp btt l-p la- laa lab lal lao lap lat lba lbb lbl lbo lbp lbt lla llb lll llo llp llt loa lob lol loo lop lot lpa lpb lpl lpo lpp lpt lta ltb ltl lto ltp ltt oaa oab oal oao oap oat ob- oba obb obl obo obp obt ola olb oll olo olp olt oo- ooa oob ool ooo oop oot op- opa opb opl opo opp opt ot- ota otb otl oto otp ott p-p paa pab pal pao pap pat pba pbb pbl pbo pbp pbt pla plb pll plo plp plt poa pob pol poo pop pot ppa ppb ppl ppo ppp ppt pt- pta ptb ptl pto ptp ptt taa tab tal tao tap tat tba tbb tbl tbo tbp tbt tla tll tlo tlp tlt to- toa tob tol too top tot tpa tpb tpl tpo tpp tpt tta ttb ttl tto ttp ttt