-er a-a a-b a-c aaa aab aac aae aag aah aan aao aar aau ab- aba abb abc abe abg abh abn abo abr abu ac- aca acb acc ace acg ach acn aco acr acu aea aeb aec aee aeg aeh aen aeo aer aeu ag- aga agb agc age agg agh agn ago agr agu aha ahb ahc ahe ahg ahh ahn aho ahr ahu an- ana anb anc ane ang anh ann ano anr anu aoa aob aoc aoe aog aoh aon aoo aor aou ar- ara arb arc are arg arh arn aro arr aru au- aua aub auc aue aug auh aun auo aur b-u baa bab bac bae bag bah ban bao bar bau bba bbb bbc bbe bbg bbh bbn bbo bbr bbu bca bcb bcc bce bcg bch bcn bco bcr bcu be- bea beb bec bee beg beh ben beo ber beu bga bgb bgc bge bgg bgh bgn bgo bgr bgu bha bhb bhc bhe bhg bhh bho bhr bhu bna bnb bnc bne bng bnn bno bnr bnu boa bob boc boe bog boh bon boo bor bou bra brb bre brg brh brn bro brr bru bua bub buc bue bug buh bun buo bur buu c-- caa cab cac cae cag cah can cao car cau cba cbb cbc cbe cbg cbh cbn cbo cbr cbu cca ccb ccc cce ccg cch ccn cco ccr ccu ce- cea ceb cec cee ceg ceh cen ceo cer ceu cga cgb cgc cge cgg cgh cgn cgo cgr cgu ch- cha chb chc che chg chh chn cho chr chu cn- cna cnb cnc cne cng cnh cnn cno cnr cnu co- coa cob coc coe cog coh con coo cor cou cra crb crc cre crg crh crn cro crr cru cua cub cuc cue cug cuh cun cuo cur cuu eaa eab eac eae eag eah ean eao ear eau eba ebb ebc ebe ebg ebh ebn ebo ebr ebu ec- eca ecb ecc ece ecg ech ecn eco ecr ecu eea eeb eec eee eeg een eeo eer ega egb egc ege egg egh egn ego egr egu eha ehb ehc ehe ehg ehh ehn eho ehr ehu en- ena enb enc ene eng enh enn eno enr enu eo- eoa eob eoc eoe eog eoh eon eoo eor eou era erb erc ere erg erh ern ero err eru eu- eua eub euc eue eug eun eur gaa gab gac gae gag gah gan gao gar gau gba gbc gbe gbg gbh gbn gbo gbr gbu gca gcb gcc gce gcg gch gcn gco gcr gcu ge- gea geb gec gee geg geh gen geo ger geu gga ggb ggc ggg ggh ggn ggo ggr ggu gha ghb ghc ghe ghg ghh ghn gho ghr gna gnb gnc gne gnn gno gnr gnu goa gob goc goe gog goh gon goo gor gou gra grb grc gre grg grh grn gro grr gru gu- gua gub guc gue gug gun guo gur guu haa hab hac hae hag hah han hao har hau hba hbb hbc hbe hbg hbh hbn hbo hbr hbu hca hcb hcc hce hcg hch hcn hco hcr he- hea heb hec hee heg heh hen heo her heu hga hgb hgc hge hgg hgh hgn hgo hgr hgu hha hhb hhc hhe hhg hhh hhn hho hhr hhu hna hnb hnc hne hng hnh hnn hno hnu hoa hob hoc hoe hog hoh hon hoo hor hou hr- hra hrb hrc hre hrg hrh hrn hro hrr hru hua hub huc hue hug huh hun huo hur huu naa nab nac nae nag nah nan nao nar nau nba nbb nbc nbe nbg nbn nbo nbr nbu nca ncb ncc nce ncg nch ncn nco ncr ncu ne- nea neb nec nee neg neh nen neo ner neu nga ngb ngc nge ngg ngh ngn ngo ngu nha nhb nhc nhe nhg nhh nhn nhr nhu nna nnb nnc nne nng nnh nnn nno nnu no- noa nob noc noe nog noh non noo nor nou nra nrb nrc nre nrg nrn nro nrr nru nua nub nuc nue nug nuh nun nuo nur nuu oaa oab oac oae oag oah oan oao oar oau ob- oba obb obc obe obg obh obn obo obr obu oc- oca ocb occ ocg och ocn oco ocr ocu oea oeb oec oee oeg oeh oen oeo oer oga ogc oge ogg ogh ogn ogo oha ohc ohe ohg ohh ohn oho ohr ohu on- ona onb onc one ong onh onn ono onr onu oo- ooa oob ooc oog ooh oon ooo oor or- ora orb orc ore org orh orn oro orr oru ou- oua ouc oue ouh oun ouo our ra- raa rab rac rae rag rah ran rao rar rau rba rbb rbc rbe rbg rbh rbn rbo rbr rbu rca rcb rcc rce rcg rch rcn rco rcr rcu re- rea reb rec ree reg reh ren reo rer reu rga rgb rgc rge rgg rgh rgn rgo rgr rh- rha rhb rhc rhe rhg rhh rhn rho rhr rhu rna rnb rnc rng rnh rnn rno rnr rnu roa rob roc roe rog roh ron roo ror rou rra rrb rrc rrg rrh rrn rrr rru rua rub ruc rue rug ruh run ruo rur ruu ua- uaa uab uac uae uag uah uan uao uar uau uba ubb ubc ube ubg ubh ubn ubo ubr ubu uca ucb ucc uce ucg uch ucn uco ucr ucu uea ueb uec uee ueg ueh uen uer uga ugb ugc uge ugg ugh ugn ugo ugr ugu uha uhb uhc uhe uhh uho uhr uhu un- una unb unc une ung unh unn uno unr unu uoa uob uoc uoe uog uon uoo uor ur- ura urb urc ure urg urn uro urr uru uua uuc uue uug uun uur uuu