a-a a-b a-i aaa aab aag aai aar aas aav ab- aba abb abg abi abr abs abv ag- aga agb agg agi agr ags agv ai- aia aib aig aii air ais aiv ar- ara arb arg ari arr ars arv as- asa asb asg asi asr ass asv av- ava avb avg avi avr avs baa bab bag bai bar bas bav bba bbb bbg bbi bbr bbs bga bgb bgg bgi bgr bgs bgv bi- bia bib big bii bir bis biv bra brb brg bri brr brs brv bsa bsb bsg bsi bsr bss bsv bva bvb bvg bvi bvr bvs bvv gaa gab gag gai gar gas gav gba gbg gbi gbr gbs gbv gga ggb ggg ggi ggr ggs ggv gia gib gig gii gir gis giv gra grb grg gri grr grs grv gsa gsb gsg gsi gsr gss gsv gva gvb gvg gvi gvr gvs i-v ia- iaa iab iag iai iar ias iav iba ibb ibg ibi ibr ibs ibv iga igb igg igi igr igs iia iib iii iir iis ir- ira irb irg iri irr irs irv is- isa isb isg isi isr iss isv iva ivb ivg ivi ivr ivs ivv ra- raa rab rag rai rar ras rav rba rbb rbg rbi rbr rbs rga rgb rgg rgi rgr rgs rgv ria rib rig rii rir ris riv rra rrb rrg rri rrr rrs rsa rsb rsg rsi rsr rss rsv rva rvb rvg rvi rvr rvs rvv saa sab sag sai sar sas sav sba sbb sbg sbi sbr sbs sbv sga sgb sgg sgi sgr sgs sgv sia sib sig sii sir sis siv sr- sra srb srg sri srr srs srv ss- ssa ssb ssg ssi ssr sss ssv sva svb svg svi svr svs svv v-a vaa vab vag vai var vas vav vba vbg vbi vbr vbs vbv vga vgg vgr vgs vi- via vib vig vii vir vis viv vra vrb vrg vri vrr vrs vsa vsb vsg vsi vsr vss vsv vva vvb vvg vvi vvr vvs vvv