a-a a-b aaa aab aak aar aas aav aay ab- aba abb abk abr abs abv aby aka akb akk akr aks akv ar- ara arb ark arr ars arv ary as- asa asb ask asr ass asv asy av- ava avb avk avr avs avy ay- aya ayk ayr ays baa bab bak bar bas bav bay bba bbb bbk bbr bbs bby bka bkb bkk bkr bks bkv bra brb brk brr brs brv bry bsa bsb bsk bsr bss bsv bsy bva bvb bvk bvr bvs bvv by- bya byk byr bys ka- kaa kab kak kar kas kav kay kba kbb kbk kbr kbs kkb kkk kkr kks kkv kky kra krk krr krs krv kry ksa ksb ksk ksr kss ksv kva kvb kvk kvr kvs kvv kya kyr kys ra- raa rab rak rar ras rav ray rba rbb rbk rbr rbs rkb rkk rks rkv rky rra rrb rrk rrr rrs rsa rsb rsk rsr rss rsv rva rvb rvr rvs rvv rvy ry- rya ryk ryr rys ryy saa sab sak sar sas sav say sba sbb sbk sbr sbs sbv sby sk- ska skb skk skr sks sky sr- sra srb srk srr srs srv sry ss- ssa ssb ssk ssr sss ssv sva svb svk svr svs svv svy sy- sya syb syk syr sys v-a vaa vab vak var vas vav vay vba vbk vbr vbs vbv vka vkb vra vrb vrk vrr vrs vry vsa vsb vsk vsr vss vsv vva vvb vvr vvs vvv yaa yab yak yar yas yav yay ybr ybs yby yka ykk yra yrs ysa ysb ysk ysr yss ysy yva yvr yvy yyb yys yyy