-er a-a a-b a-c aaa aab aac aad aae aah aan aao aar aau ab- aba abb abc abd abe abh abn abo abr abu ac- aca acb acc acd ace ach acn aco acr acu ad- ada adb adc add ade adh adn ado adr adu aea aeb aec aed aee aeh aen aeo aer aeu aha ahb ahc ahd ahe ahh ahn aho ahr ahu an- ana anb anc and ane anh ann ano anr anu aoa aob aoc aod aoe aoh aon aoo aor aou ar- ara arb arc ard are arh arn aro arr aru au- aua aub auc aud aue auh aun auo aur b-u baa bab bac bad bae bah ban bao bar bau bba bbb bbc bbd bbe bbh bbn bbo bbr bbu bca bcb bcc bcd bce bch bcn bco bcr bcu bda bdb bdc bdd bde bdh bdo bdr bdu be- bea beb bec bed bee beh ben beo ber beu bha bhb bhc bhd bhe bhh bho bhr bhu bna bnb bnc bnd bne bnn bno bnr bnu boa bob boc bod boe boh bon boo bor bou bra brb brd bre brh brn bro brr bru bua bub buc bud bue buh bun buo bur buu c-- caa cab cac cad cae cah can cao car cau cba cbb cbc cbd cbe cbh cbn cbo cbr cbu cca ccb ccc ccd cce cch ccn cco ccr ccu cda cdb cdc cdd cde cdh cdn cdo cdr cdu ce- cea ceb cec ced cee ceh cen ceo cer ceu ch- cha chb chc chd che chh chn cho chr chu cn- cna cnb cnc cnd cne cnh cnn cno cnr cnu co- coa cob coc cod coe coh con coo cor cou cra crb crc crd cre crh crn cro crr cru cua cub cuc cud cue cuh cun cuo cur cuu daa dab dac dad dae dah dan dao dar dau dba dbb dbc dbd dbe dbh dbn dbo dbr dbu dca dcb dcc dcd dce dcn dco dcr dcu dda ddb ddc ddd dde ddh ddn ddo ddr ddu de- dea deb dec ded dee deh den deo der deu dh- dha dhb dhc dhd dhe dhh dho dhr dhu dna dnb dnc dnd dne dnh dnn dno dnr doa dob doc dod doe doh don doo dor dou dra drb drc drd dre drn dro drr dru dua dub duc dud due duh dun duo dur eaa eab eac ead eae eah ean eao ear eau eba ebb ebc ebd ebe ebh ebn ebo ebr ebu ec- eca ecb ecc ecd ece ech ecn eco ecr ecu ed- eda edb edc edd ede edh edn edo edr edu eea eeb eec eed eee een eeo eer eha ehb ehc ehd ehe ehh ehn eho ehr ehu en- ena enb enc end ene enh enn eno enr enu eo- eoa eob eoc eod eoe eoh eon eoo eor eou era erb erc erd ere erh ern ero err eru eu- eua eub euc eud eue eun eur haa hab hac had hae hah han hao har hau hba hbb hbc hbd hbe hbh hbn hbo hbr hbu hca hcb hcc hcd hce hch hcn hco hcr hda hdb hdc hdd hde hdh hdn hdo hdr hdu he- hea heb hec hed hee heh hen heo her heu hha hhb hhc hhd hhe hhh hhn hho hhr hhu hna hnb hnc hnd hne hnh hnn hno hnu hoa hob hoc hod hoe hoh hon hoo hor hou hr- hra hrb hrc hrd hre hrh hrn hro hrr hru hua hub huc hud hue huh hun huo hur huu naa nab nac nad nae nah nan nao nar nau nba nbb nbc nbd nbe nbn nbo nbr nbu nca ncb ncc ncd nce nch ncn nco ncr ncu nda ndb ndc ndd nde ndh ndn ndo ndr ndu ne- nea neb nec ned nee neh nen neo ner neu nha nhb nhc nhd nhe nhh nhn nhr nhu nna nnb nnc nne nnh nnn nno nnu no- noa nob noc nod noe noh non noo nor nou nra nrb nrc nrd nre nrn nro nrr nru nua nub nuc nud nue nuh nun nuo nur nuu oaa oab oac oad oae oah oan oao oar oau ob- oba obb obc obd obe obh obn obo obr obu oc- oca ocb occ ocd och ocn oco ocr ocu oda odb odc odd ode odh odn odo odr odu oea oeb oec oed oee oeh oen oeo oer oha ohc ohd ohe ohh ohn oho ohr ohu on- ona onb onc ond one onh onn ono onr onu oo- ooa oob ooc ood ooh oon ooo oor or- ora orb orc ord ore orh orn oro orr oru ou- oua ouc oud oue ouh oun ouo our ra- raa rab rac rad rae rah ran rao rar rau rba rbb rbc rbd rbe rbh rbn rbo rbr rbu rca rcb rcc rcd rce rch rcn rco rcr rcu rda rdb rdc rdd rde rdh rdn rdo rdr rdu re- rea reb rec red ree reh ren reo rer reu rh- rha rhb rhc rhd rhe rhh rhn rho rhr rhu rna rnb rnc rnd rnh rnn rno rnr rnu roa rob roc rod roe roh ron roo ror rou rra rrb rrc rrd rrh rrn rrr rru rua rub ruc rud rue ruh run ruo rur ruu ua- uaa uab uac uad uae uah uan uao uar uau uba ubb ubc ube ubh ubn ubo ubr ubu uca ucb ucc ucd uce uch ucn uco ucr ucu uda udb udc udd ude udn udo udr udu uea ueb uec ued uee ueh uen uer uha uhb uhc uhd uhe uhh uho uhr uhu un- una unb unc und une unh unn uno unr unu uoa uob uoc uod uoe uon uoo uor ur- ura urb urc urd ure urn uro urr uru uua uuc uue uun uur uuu