-al -er a-a a-b a-c a-t aaa aab aac aad aae aal aap aar aat ab- aba abb abc abd abe abl abp abr abt ac- aca acb acc acd ace acl acp acr act ad- ada adb adc add ade adl adp adr adt aea aeb aec aed aee ael aep aer aet al- ala alb alc ald ale all alp alr alt ap- apa apb apc apd ape apl app apr apt ar- ara arb arc ard are arl arp arr art at- ata atb atc atd ate atl atp atr att b-p baa bab bac bad bae bal bap bar bat bba bbb bbc bbd bbe bbl bbp bbr bbt bca bcb bcc bcd bce bcl bcp bcr bct bda bdb bdc bdd bde bdl bdp bdr bdt be- bea beb bec bed bee bel bep ber bet bla blb blc bld ble bll blp blr blt bpa bpb bpc bpd bpe bpl bpp bpr bpt bra brb brd bre brl brp brr brt bta btb btc btd bte btl btp btr btt c-- caa cab cac cad cae cal cap car cat cba cbb cbc cbd cbe cbl cbp cbr cbt cca ccb ccc ccd cce ccl ccp ccr cct cda cdb cdc cdd cde cdl cdp cdr cdt ce- cea ceb cec ced cee cel cep cer cet cl- cla clb clc cld cle cll clp clr clt cpa cpb cpc cpd cpe cpl cpp cpr cpt cra crb crc crd cre crl crp crr crt cta ctb ctc ctd cte ctl ctp ctr ctt daa dab dac dad dae dal dap dar dat dba dbb dbc dbd dbe dbl dbp dbr dbt dca dcb dcc dcd dce dcl dcp dcr dct dda ddb ddc ddd dde ddl ddp ddr ddt de- dea deb dec ded dee del dep der det dl- dla dlb dlc dld dle dll dlp dlr dlt dpa dpb dpc dpd dpe dpl dpp dpr dpt dra drb drc drd dre drl drp drr drt dta dtb dtc dtd dte dtl dtp dtr dtt eaa eab eac ead eae eal eap ear eat eba ebb ebc ebd ebe ebl ebp ebr ebt ec- eca ecb ecc ecd ece ecl ecr ect ed- eda edb edc edd ede edl edp edr edt eea eeb eec eed eee eel eep eer eet ela elb elc eld ele ell elp elr elt ep- epa epb epc epd epe epl epp epr ept era erb erc erd ere erl erp err ert eta etb etc etd ete etl etp etr ett l-p la- laa lab lac lad lae lal lap lar lat lba lbb lbc lbd lbe lbl lbp lbr lbt lca lcb lcc lcd lce lcl lcp lcr lct lda ldb ldc ldd lde ldl ldp ldr ldt lea leb lec led lee lel lep ler let lla llb llc lld lle lll llp llr llt lpa lpb lpc lpd lpe lpl lpp lpr lpt lra lrb lrc lrd lrp lrr lrt lta ltb ltc ltd lte ltl ltp ltr ltt p-p paa pab pac pad pae pal pap par pat pba pbb pbc pbd pbe pbl pbp pbr pbt pca pcb pcc pcd pce pcl pcp pcr pct pda pdb pdc pdd pde pdl pdp pdr pdt pea peb pec ped pee pel pep per pet pla plb plc pld ple pll plp plr plt ppa ppb ppc ppd ppe ppl ppp ppr ppt pra prb prc prd pre prl prp prr prt pt- pta ptb ptc ptd pte ptl ptp ptr ptt ra- raa rab rac rad rae ral rap rar rat rba rbb rbc rbd rbe rbl rbp rbr rbt rca rcb rcc rcd rce rcl rcp rcr rct rda rdb rdc rdd rde rdl rdp rdr rdt re- rea reb rec red ree rel rep rer ret rla rlc rld rle rll rlp rlr rlt rpa rpb rpc rpd rpe rpl rpp rpr rpt rra rrb rrc rrd rrl rrp rrr rrt rta rtb rtc rtd rte rtl rtp rtr rtt taa tab tac tad tae tal tap tar tat tba tbb tbc tbd tbe tbl tbp tbr tbt tca tcb tcc tcd tce tcl tcp tcr tct tda tdb tdc tdd tde tdl tdp tdr tdt te- tea teb tec ted tee tel tep ter tet tla tlc tld tle tll tlp tlr tlt tpa tpb tpc tpd tpe tpl tpp tpr tpt tra trb trc trd tre trl trp trr trt tta ttb ttc ttd tte ttl ttp ttr ttt