-ic a-a a-b a-c a-i aaa aab aac aag aai aan aao aar aau ab- aba abb abc abg abi abn abo abr abu ac- aca acb acc acg aci acn aco acr acu ag- aga agb agc agg agi agn ago agr agu ai- aia aib aic aig aii ain aio air aiu an- ana anb anc ang ani ann ano anr anu aoa aob aoc aog aoi aon aoo aor aou ar- ara arb arc arg ari arn aro arr aru au- aua aub auc aug aui aun auo aur b-u baa bab bac bag bai ban bao bar bau bba bbb bbc bbg bbi bbn bbo bbr bbu bca bcb bcc bcg bci bcn bco bcr bcu bga bgb bgc bgg bgi bgn bgo bgr bgu bi- bia bib bic big bii bin bio bir biu bna bnb bnc bng bni bnn bno bnr bnu boa bob boc bog boi bon boo bor bou bra brb brg bri brn bro brr bru bua bub buc bug bui bun buo bur buu c-- caa cab cac cag cai can cao car cau cba cbb cbc cbg cbi cbn cbo cbr cbu cca ccb ccc ccg cci ccn cco ccr ccu cga cgb cgc cgg cgi cgn cgo cgr cgu ci- cia cib cic cig cii cin cio cir ciu cn- cna cnb cnc cng cni cnn cno cnr cnu co- coa cob coc cog coi con coo cor cou cra crb crc crg cri crn cro crr cru cua cub cuc cug cui cun cuo cur cuu gaa gab gac gag gai gan gao gar gau gba gbc gbg gbi gbn gbo gbr gbu gca gcb gcc gcg gci gcn gco gcr gcu gga ggb ggc ggg ggi ggn ggo ggr ggu gia gib gic gig gii gin gio gir giu gna gnb gnc gni gnn gno gnr gnu goa gob goc gog goi gon goo gor gou gra grb grc grg gri grn gro grr gru gu- gua gub guc gug gui gun guo gur guu ia- iaa iab iac iag iai ian iao iar iau iba ibb ibc ibg ibi ibn ibo ibr ibu ica icb icc icg ici icn ico icr icu iga igb igc igg igi ign igo igr igu iia iib iic iii iin iio iir iiu in- ina inb inc ing ini inn ino inr inu io- ioa iob ioc iog ioi ion ioo ior iou ir- ira irb irc irg iri irn iro irr iru iu- iua iub iuc iug iui iur n-i naa nab nac nag nai nan nao nar nau nba nbb nbc nbg nbi nbn nbo nbr nbu nca ncb ncc ncg nci ncn nco ncr ncu nga ngb ngc ngg ngi ngn ngo ngu nia nib nic nig nii nin nio nir niu nna nnb nnc nng nni nnn nno nnu no- noa nob noc nog noi non noo nor nou nra nrb nrc nrg nri nrn nro nrr nru nua nub nuc nug nui nun nuo nur nuu o-i oaa oab oac oag oai oan oao oar oau ob- oba obb obc obg obi obn obo obr obu oc- oca ocb occ ocg oci ocn oco ocr ocu oga ogc ogg ogi ogn ogo oia oib oic oii oin oio oir oiu on- ona onb onc ong oni onn ono onr onu oo- ooa oob ooc oog ooi oon ooo oor or- ora orb orc org ori orn oro orr oru ou- oua ouc oui oun ouo our ra- raa rab rac rag rai ran rao rar rau rba rbb rbc rbg rbi rbn rbo rbr rbu rca rcb rcc rcg rci rcn rco rcr rcu rga rgb rgc rgg rgi rgn rgo rgr ria rib ric rig rii rin rio rir rna rnb rnc rng rni rnn rno rnr rnu roa rob roc rog roi ron roo ror rou rra rrb rrc rrg rri rrn rrr rru rua rub ruc rug rui run ruo rur ruu ua- uaa uab uac uag uai uan uao uar uau uba ubb ubc ubg ubi ubn ubo ubr ubu uca ucb ucc ucg uci ucn uco ucr ucu uga ugb ugc ugg ugi ugn ugo ugr ugu uia uib uic uig uii uin uio uir uiu un- una unb unc ung uni unn uno unr unu uoa uob uoc uog uon uoo uor ur- ura urb urc urg uri urn uro urr uru uua uuc uug uun uur uuu