-al -er a-a a-b a-c a-t aaa aab aac aad aae aal aar aat aau ab- aba abb abc abd abe abl abr abt abu ac- aca acb acc acd ace acl acr act acu ad- ada adb adc add ade adl adr adt adu aea aeb aec aed aee ael aer aet aeu al- ala alb alc ald ale all alr alt alu ar- ara arb arc ard are arl arr art aru at- ata atb atc atd ate atl atr att atu au- aua aub auc aud aue aul aur aut b-u baa bab bac bad bae bal bar bat bau bba bbb bbc bbd bbe bbl bbr bbt bbu bca bcb bcc bcd bce bcl bcr bct bcu bda bdb bdc bdd bde bdl bdr bdt bdu be- bea beb bec bed bee bel ber bet beu bla blb blc bld ble bll blr blt blu bra brb brd bre brl brr brt bru bta btb btc btd bte btl btr btt btu bua bub buc bud bue bul bur but buu c-- caa cab cac cad cae cal car cat cau cba cbb cbc cbd cbe cbl cbr cbt cbu cca ccb ccc ccd cce ccl ccr cct ccu cda cdb cdc cdd cde cdl cdr cdt cdu ce- cea ceb cec ced cee cel cer cet ceu cl- cla clb clc cld cle cll clr clt clu cra crb crc crd cre crl crr crt cru cta ctb ctc ctd cte ctl ctr ctt ctu cua cub cuc cud cue cul cur cut cuu daa dab dac dad dae dal dar dat dau dba dbb dbc dbd dbe dbl dbr dbt dbu dca dcb dcc dcd dce dcl dcr dct dcu dda ddb ddc ddd dde ddl ddr ddt ddu de- dea deb dec ded dee del der det deu dl- dla dlb dlc dld dle dll dlr dlt dlu dra drb drc drd dre drl drr drt dru dta dtb dtc dtd dte dtl dtr dtt dtu dua dub duc dud due dul dur dut eaa eab eac ead eae eal ear eat eau eba ebb ebc ebd ebe ebl ebr ebt ebu ec- eca ecb ecc ecd ece ecl ecr ect ecu ed- eda edb edc edd ede edl edr edt edu eea eeb eec eed eee eel eer eet ela elb elc eld ele ell elr elt elu era erb erc erd ere erl err ert eru eta etb etc etd ete etl etr ett etu eu- eua eub euc eud eue eul eur eut la- laa lab lac lad lae lal lar lat lau lba lbb lbc lbd lbe lbl lbr lbt lbu lca lcb lcc lcd lce lcl lcr lct lcu lda ldb ldc ldd lde ldl ldr ldt ldu lea leb lec led lee lel ler let leu lla llb llc lld lle lll llr llt llu lra lrb lrc lrd lrr lrt lru lta ltb ltc ltd lte ltl ltr ltt ltu lua lub luc lud lue lul lur lut luu ra- raa rab rac rad rae ral rar rat rau rba rbb rbc rbd rbe rbl rbr rbt rbu rca rcb rcc rcd rce rcl rcr rct rcu rda rdb rdc rdd rde rdl rdr rdt rdu re- rea reb rec red ree rel rer ret reu rla rlc rld rle rll rlr rlt rlu rra rrb rrc rrd rrl rrr rrt rru rta rtb rtc rtd rte rtl rtr rtt rtu rua rub ruc rud rue rur rut ruu taa tab tac tad tae tal tar tat tau tba tbb tbc tbd tbe tbl tbr tbt tbu tca tcb tcc tcd tce tcl tcr tct tcu tda tdb tdc tdd tde tdl tdr tdt tdu te- tea teb tec ted tee tel ter tet teu tla tlc tld tle tll tlr tlt tlu tra trb trc trd tre trl trr trt tru tta ttb ttc ttd tte ttl ttr ttt ttu tua tub tuc tud tue tul tur tut tuu ua- uaa uab uac uad uae ual uar uat uau uba ubb ubc ube ubl ubr ubt ubu uca ucb ucc ucd uce ucl ucr uct ucu uda udb udc udd ude udl udr udt udu uea ueb uec ued uee uel uer uet ula ulb ulc uld ule ull ulr ult ulu ur- ura urb urc urd ure url urr urt uru uta utb utc utd ute utl utr utt utu uua uuc uue uur uut uuu