-al a-a a-b a-c a-t aaa aab aac aae aal aap aat ab- aba abb abc abe abl abp abt ac- aca acb acc ace acl acp act aea aeb aec aee ael aep aet al- ala alb alc ale all alp alt ap- apa apb apc ape apl app apt at- ata atb atc ate atl atp att b-p baa bab bac bae bal bap bat bba bbb bbc bbe bbl bbp bbt bca bcb bcc bce bcl bcp bct be- bea beb bec bee bel bep bet bla blb blc ble bll blp blt bpa bpb bpc bpe bpl bpp bpt bta btb btc bte btl btp btt c-- caa cab cac cae cal cap cat cba cbb cbc cbe cbl cbp cbt cca ccb ccc cce ccl ccp cct ce- cea ceb cec cee cel cep cet cl- cla clb clc cle cll clp clt cpa cpb cpc cpe cpl cpp cpt cta ctb ctc cte ctl ctp ctt eaa eab eac eae eal eap eat eba ebb ebc ebe ebl ebp ebt ec- eca ecb ecc ece ecl ect eea eeb eec eee eel eep eet ela elb elc ele ell elp elt ep- epa epb epc epe epl epp ept eta etb etc ete etl etp ett l-p la- laa lab lac lae lal lap lat lba lbb lbc lbe lbl lbp lbt lca lcb lcc lce lcl lcp lct lea leb lec lee lel lep let lla llb llc lle lll llp llt lpa lpb lpc lpe lpl lpp lpt lta ltb ltc lte ltl ltp ltt p-p paa pab pac pae pal pap pat pba pbb pbc pbe pbl pbp pbt pca pcb pcc pce pcl pcp pct pea peb pec pee pel pep pet pla plb plc ple pll plp plt ppa ppb ppc ppe ppl ppp ppt pt- pta ptb ptc pte ptl ptp ptt taa tab tac tae tal tap tat tba tbb tbc tbe tbl tbp tbt tca tcb tcc tce tcl tcp tct te- tea teb tec tee tel tep tet tla tlc tle tll tlp tlt tpa tpb tpc tpe tpl tpp tpt tta ttb ttc tte ttl ttp ttt