-ic a-a a-b a-c a-i aaa aab aac aag aai aar aau ab- aba abb abc abg abi abr abu ac- aca acb acc acg aci acr acu ag- aga agb agc agg agi agr agu ai- aia aib aic aig aii air aiu ar- ara arb arc arg ari arr aru au- aua aub auc aug aui aur b-u baa bab bac bag bai bar bau bba bbb bbc bbg bbi bbr bbu bca bcb bcc bcg bci bcr bcu bga bgb bgc bgg bgi bgr bgu bi- bia bib bic big bii bir biu bra brb brg bri brr bru bua bub buc bug bui bur buu c-- caa cab cac cag cai car cau cba cbb cbc cbg cbi cbr cbu cca ccb ccc ccg cci ccr ccu cga cgb cgc cgg cgi cgr cgu ci- cia cib cic cig cii cir ciu cra crb crc crg cri crr cru cua cub cuc cug cui cur cuu gaa gab gac gag gai gar gau gba gbc gbg gbi gbr gbu gca gcb gcc gcg gci gcr gcu gga ggb ggc ggg ggi ggr ggu gia gib gic gig gii gir giu gra grb grc grg gri grr gru gu- gua gub guc gug gui gur guu ia- iaa iab iac iag iai iar iau iba ibb ibc ibg ibi ibr ibu ica icb icc icg ici icr icu iga igb igc igg igi igr igu iia iib iic iii iir iiu ir- ira irb irc irg iri irr iru iu- iua iub iuc iug iui iur ra- raa rab rac rag rai rar rau rba rbb rbc rbg rbi rbr rbu rca rcb rcc rcg rci rcr rcu rga rgb rgc rgg rgi rgr ria rib ric rig rii rir rra rrb rrc rrg rri rrr rru rua rub ruc rug rui rur ruu ua- uaa uab uac uag uai uar uau uba ubb ubc ubg ubi ubr ubu uca ucb ucc ucg uci ucr ucu uga ugb ugc ugg ugi ugr ugu uia uib uic uig uii uir uiu ur- ura urb urc urg uri urr uru uua uuc uug uur uuu