a-a a-b a-i aaa aab aai aak aar aas aav ab- aba abb abi abk abr abs abv ai- aia aib aii aik air ais aiv aka akb aki akk akr aks akv ar- ara arb ari ark arr ars arv as- asa asb asi ask asr ass asv av- ava avb avi avk avr avs baa bab bai bak bar bas bav bba bbb bbi bbk bbr bbs bi- bia bib bii bik bir bis biv bka bkb bkk bkr bks bkv bra brb bri brk brr brs brv bsa bsb bsi bsk bsr bss bsv bva bvb bvi bvk bvr bvs bvv i-v ia- iaa iab iai iar ias iav iba ibb ibi ibk ibr ibs ibv iia iib iii iir iis ika ikb iki ikk ikr iks ikv ir- ira irb iri irk irr irs irv is- isa isb isi isk isr iss isv iva ivb ivi ivr ivs ivv ka- kaa kab kai kak kar kas kav kba kbb kbi kbk kbr kbs kia kib kii kik kir kis kiv kkb kki kkk kkr kks kkv kra kri krk krr krs krv ksa ksb ksi ksk ksr kss ksv kva kvb kvi kvk kvr kvs kvv ra- raa rab rai rak rar ras rav rba rbb rbi rbk rbr rbs ria rib rii rik rir ris riv rkb rkk rks rkv rra rrb rri rrk rrr rrs rsa rsb rsi rsk rsr rss rsv rva rvb rvi rvr rvs rvv saa sab sai sak sar sas sav sba sbb sbi sbk sbr sbs sbv sia sib sii sik sir sis siv sk- ska skb ski skk skr sks sr- sra srb sri srk srr srs srv ss- ssa ssb ssi ssk ssr sss ssv sva svb svi svk svr svs svv v-a vaa vab vai vak var vas vav vba vbi vbk vbr vbs vbv vi- via vib vii vik vir vis viv vka vkb vra vrb vri vrk vrr vrs vsa vsb vsi vsk vsr vss vsv vva vvb vvi vvr vvs vvv