-ic a-a a-b a-c a-i aaa aab aac aag aai aan aar aau ab- aba abb abc abg abi abn abr abu ac- aca acb acc acg aci acn acr acu ag- aga agb agc agg agi agn agr agu ai- aia aib aic aig aii ain air aiu an- ana anb anc ang ani ann anr anu ar- ara arb arc arg ari arn arr aru au- aua aub auc aug aui aun aur b-u baa bab bac bag bai ban bar bau bba bbb bbc bbg bbi bbn bbr bbu bca bcb bcc bcg bci bcn bcr bcu bga bgb bgc bgg bgi bgn bgr bgu bi- bia bib bic big bii bin bir biu bna bnb bnc bng bni bnn bnr bnu bra brb brg bri brn brr bru bua bub buc bug bui bun bur buu c-- caa cab cac cag cai can car cau cba cbb cbc cbg cbi cbn cbr cbu cca ccb ccc ccg cci ccn ccr ccu cga cgb cgc cgg cgi cgn cgr cgu ci- cia cib cic cig cii cin cir ciu cn- cna cnb cnc cng cni cnn cnr cnu cra crb crc crg cri crn crr cru cua cub cuc cug cui cun cur cuu gaa gab gac gag gai gan gar gau gba gbc gbg gbi gbn gbr gbu gca gcb gcc gcg gci gcn gcr gcu gga ggb ggc ggg ggi ggn ggr ggu gia gib gic gig gii gin gir giu gna gnb gnc gni gnn gnr gnu gra grb grc grg gri grn grr gru gu- gua gub guc gug gui gun gur guu ia- iaa iab iac iag iai ian iar iau iba ibb ibc ibg ibi ibn ibr ibu ica icb icc icg ici icn icr icu iga igb igc igg igi ign igr igu iia iib iic iii iin iir iiu in- ina inb inc ing ini inn inr inu ir- ira irb irc irg iri irn irr iru iu- iua iub iuc iug iui iur n-i naa nab nac nag nai nan nar nau nba nbb nbc nbg nbi nbn nbr nbu nca ncb ncc ncg nci ncn ncr ncu nga ngb ngc ngg ngi ngn ngu nia nib nic nig nii nin nir niu nna nnb nnc nng nni nnn nnu nra nrb nrc nrg nri nrn nrr nru nua nub nuc nug nui nun nur nuu ra- raa rab rac rag rai ran rar rau rba rbb rbc rbg rbi rbn rbr rbu rca rcb rcc rcg rci rcn rcr rcu rga rgb rgc rgg rgi rgn rgr ria rib ric rig rii rin rir rna rnb rnc rng rni rnn rnr rnu rra rrb rrc rrg rri rrn rrr rru rua rub ruc rug rui run rur ruu ua- uaa uab uac uag uai uan uar uau uba ubb ubc ubg ubi ubn ubr ubu uca ucb ucc ucg uci ucn ucr ucu uga ugb ugc ugg ugi ugn ugr ugu uia uib uic uig uii uin uir uiu un- una unb unc ung uni unn unr unu ur- ura urb urc urg uri urn urr uru uua uuc uug uun uur uuu