-al -er a-a a-b a-c a-t aaa aab aac aae aak aal aam aar aat ab- aba abb abc abe abk abl abm abr abt ac- aca acb acc ace ack acl acm acr act aea aeb aec aee aek ael aem aer aet aka akb akc ake akk akl akm akr al- ala alb alc ale alk all alm alr alt ama amb amc ame amk aml amm amr amt ar- ara arb arc are ark arl arm arr art at- ata atb atc ate atl atm atr att baa bab bac bae bak bal bam bar bat bba bbb bbc bbe bbk bbl bbm bbr bbt bca bcb bcc bce bck bcl bcm bcr bct be- bea beb bec bee bek bel bem ber bet bka bkb bkc bke bkk bkl bkm bkr bkt bla blb blc ble blk bll blm blr blt bma bmb bmc bme bmk bml bmm bmr bmt bra brb bre brk brl brm brr brt bta btb btc bte btk btl btm btr btt c-- caa cab cac cae cak cal cam car cat cba cbb cbc cbe cbk cbl cbm cbr cbt cca ccb ccc cce cck ccl ccm ccr cct ce- cea ceb cec cee cek cel cem cer cet cka ckb ckc ckm ckt cl- cla clb clc cle clk cll clm clr clt cma cmb cmc cme cmk cml cmm cmr cmt cra crb crc cre crk crl crm crr crt cta ctb ctc cte ctk ctl ctm ctr ctt eaa eab eac eae eak eal eam ear eat eba ebb ebc ebe ebk ebl ebm ebr ebt ec- eca ecb ecc ece eck ecl ecm ecr ect eea eeb eec eee eek eel eem eer eet eka ekb ekc eke ekl ekr ekt ela elb elc ele elk ell elm elr elt em- ema emb emc eme emk eml emm emr emt era erb erc ere erk erl erm err ert eta etb etc ete etk etl etm etr ett k-t ka- kaa kab kac kae kak kal kam kar kat kba kbb kbc kbe kbk kbl kbm kbr kca kcb kcc kce kck kcl kcm kcr kct ke- kea keb kec kee kek kel kem ker ket kkb kkc kke kkk kkl kkm kkr kkt kl- kla klb klc klm klr klt kma kmb kmc kme kmk kml kmm kmt kra krc krk krl krr krt kta ktb ktc kte ktk ktl ktm ktr ktt la- laa lab lac lae lak lal lam lar lat lba lbb lbc lbe lbk lbl lbm lbr lbt lca lcb lcc lce lck lcl lcm lcr lct lea leb lec lee lek lel lem ler let lka lkb lkl lkr lkt lla llb llc lle llk lll llm llr llt lma lmb lmc lme lmk lml lmm lmr lmt lra lrb lrc lrk lrm lrr lrt lta ltb ltc lte ltk ltl ltm ltr ltt m-r maa mab mac mae mak mal mam mar mat mba mbb mbc mbe mbk mbl mbm mbr mbt mc- mca mcb mcc mce mck mcl mcm mcr mct mea meb mec mee mek mel mem mer met mka mkb mkc mke mkk mkl mkm mkr mkt mla mlb mlc mle mlk mll mlm mlr mlt mma mmb mmc mme mmk mml mmm mmr mmt mra mrb mrc mre mrk mrl mrm mrr mrt mta mtb mtc mte mtk mtl mtm mtr mtt ra- raa rab rac rae rak ral ram rar rat rba rbb rbc rbe rbk rbl rbm rbr rbt rca rcb rcc rce rcl rcm rcr rct re- rea reb rec ree rek rel rem rer ret rkb rkc rke rkk rkm rkt rla rlc rle rll rlm rlr rlt rma rmb rmc rme rml rmm rmr rmt rra rrb rrc rrk rrl rrm rrr rrt rta rtb rtc rte rtk rtl rtm rtr rtt taa tab tac tae tak tal tam tar tat tba tbb tbc tbe tbk tbl tbm tbr tbt tca tcb tcc tce tck tcl tcm tcr tct te- tea teb tec tee tek tel tem ter tet tka tkb tkc tke tkk tkl tkm tkr tkt tla tlc tle tlk tll tlm tlr tlt tma tmb tmc tme tmk tml tmm tmr tmt tra trb trc tre trk trl trm trr trt tta ttb ttc tte ttk ttl ttm ttr ttt