-er -ic a-a a-b a-c a-i aaa aab aac aae aag aai aan aao aar aau ab- aba abb abc abe abg abi abn abo abr abu ac- aca acb acc ace acg aci acn aco acr acu aea aeb aec aee aeg aei aen aeo aer aeu ag- aga agb agc age agg agi agn ago agr agu ai- aia aib aic aie aig aii ain aio air aiu an- ana anb anc ane ang ani ann ano anr anu aoa aob aoc aoe aog aoi aon aoo aor aou ar- ara arb arc are arg ari arn aro arr aru au- aua aub auc aue aug aui aun auo aur b-u baa bab bac bae bag bai ban bao bar bau bba bbb bbc bbe bbg bbi bbn bbo bbr bbu bca bcb bcc bce bcg bci bcn bco bcr bcu be- bea beb bec bee beg bei ben beo ber beu bga bgb bgc bge bgg bgi bgn bgo bgr bgu bi- bia bib bic bie big bii bin bio bir biu bna bnb bnc bne bng bni bnn bno bnr bnu boa bob boc boe bog boi bon boo bor bou bra brb bre brg bri brn bro brr bru bua bub buc bue bug bui bun buo bur buu c-- caa cab cac cae cag cai can cao car cau cba cbb cbc cbe cbg cbi cbn cbo cbr cbu cca ccb ccc cce ccg cci ccn cco ccr ccu ce- cea ceb cec cee ceg cei cen ceo cer ceu cga cgb cgc cge cgg cgi cgn cgo cgr cgu ci- cia cib cic cie cig cii cin cio cir ciu cn- cna cnb cnc cne cng cni cnn cno cnr cnu co- coa cob coc coe cog coi con coo cor cou cra crb crc cre crg cri crn cro crr cru cua cub cuc cue cug cui cun cuo cur cuu eaa eab eac eae eag eai ean eao ear eau eba ebb ebc ebe ebg ebi ebn ebo ebr ebu ec- eca ecb ecc ece ecg eci ecn eco ecr ecu eea eeb eec eee eeg een eeo eer ega egb egc ege egg egi egn ego egr egu eia eib eic eie eig eii ein eio eir eiu en- ena enb enc ene eng eni enn eno enr enu eo- eoa eob eoc eoe eog eoi eon eoo eor eou era erb erc ere erg eri ern ero err eru eu- eua eub euc eue eug eui eun eur gaa gab gac gae gag gai gan gao gar gau gba gbc gbe gbg gbi gbn gbo gbr gbu gca gcb gcc gce gcg gci gcn gco gcr gcu ge- gea geb gec gee geg gei gen geo ger geu gga ggb ggc ggg ggi ggn ggo ggr ggu gia gib gic gie gig gii gin gio gir giu gna gnb gnc gne gni gnn gno gnr gnu goa gob goc goe gog goi gon goo gor gou gra grb grc gre grg gri grn gro grr gru gu- gua gub guc gue gug gui gun guo gur guu ia- iaa iab iac iae iag iai ian iao iar iau iba ibb ibc ibe ibg ibi ibn ibo ibr ibu ica icb icc ice icg ici icn ico icr icu ie- iea iec iee ieg iei ien ier iga igb igc ige igg igi ign igo igr igu iia iib iic iie iii iin iio iir iiu in- ina inb inc ine ing ini inn ino inr inu io- ioa iob ioc ioe iog ioi ion ioo ior iou ir- ira irb irc ire irg iri irn iro irr iru iu- iua iub iuc iue iug iui iur n-i naa nab nac nae nag nai nan nao nar nau nba nbb nbc nbe nbg nbi nbn nbo nbr nbu nca ncb ncc nce ncg nci ncn nco ncr ncu ne- nea neb nec nee neg nei nen neo ner neu nga ngb ngc nge ngg ngi ngn ngo ngu nia nib nic nie nig nii nin nio nir niu nna nnb nnc nne nng nni nnn nno nnu no- noa nob noc noe nog noi non noo nor nou nra nrb nrc nre nrg nri nrn nro nrr nru nua nub nuc nue nug nui nun nuo nur nuu o-i oaa oab oac oae oag oai oan oao oar oau ob- oba obb obc obe obg obi obn obo obr obu oc- oca ocb occ ocg oci ocn oco ocr ocu oea oeb oec oee oeg oei oen oeo oer oga ogc oge ogg ogi ogn ogo oia oib oic oie oii oin oio oir oiu on- ona onb onc one ong oni onn ono onr onu oo- ooa oob ooc oog ooi oon ooo oor or- ora orb orc ore org ori orn oro orr oru ou- oua ouc oue oui oun ouo our ra- raa rab rac rae rag rai ran rao rar rau rba rbb rbc rbe rbg rbi rbn rbo rbr rbu rca rcb rcc rce rcg rci rcn rco rcr rcu re- rea reb rec ree reg rei ren reo rer reu rga rgb rgc rge rgg rgi rgn rgo rgr ria rib ric rie rig rii rin rio rir rna rnb rnc rng rni rnn rno rnr rnu roa rob roc roe rog roi ron roo ror rou rra rrb rrc rrg rri rrn rrr rru rua rub ruc rue rug rui run ruo rur ruu ua- uaa uab uac uae uag uai uan uao uar uau uba ubb ubc ube ubg ubi ubn ubo ubr ubu uca ucb ucc uce ucg uci ucn uco ucr ucu uea ueb uec uee ueg uei uen uer uga ugb ugc uge ugg ugi ugn ugo ugr ugu uia uib uic uie uig uii uin uio uir uiu un- una unb unc une ung uni unn uno unr unu uoa uob uoc uoe uog uon uoo uor ur- ura urb urc ure urg uri urn uro urr uru