a-a a-b aaa aab aah aan aao aav aay ab- aba abb abh abn abo abv aby aha ahb ahh ahn aho ahv ahy an- ana anb anh ann ano anv any aoa aob aoh aon aoo aov av- ava avb avh avn avo avy ay- aya ayh ayn ayo baa bab bah ban bao bav bay bba bbb bbh bbn bbo bby bha bhb bhh bho bhv bna bnb bnn bno bnv boa bob boh bon boo bov boy bva bvb bvh bvn bvo bvv by- bya byh byn byo haa hab hah han hao hav hay hba hbb hbh hbn hbo hbv hby hha hhb hhh hhn hho hhv hhy hna hnb hnh hnn hno hnv hny hoa hob hoh hon hoo hov hoy hv- hva hvb hvn hvo hvv hvy hy- hya hyb hyh hyn hyo hyv hyy naa nab nah nan nao nav nay nba nbb nbn nbo nbv nha nhb nhh nhn nhv nhy nna nnb nnh nnn nno nnv no- noa nob noh non noo nov noy nva nvb nvh nvn nvv nya nyn nyo nyy oaa oab oah oan oao oav ob- oba obb obh obn obo obv oby oha ohh ohn oho on- ona onb onh onn ono ony oo- ooa oob ooh oon ooo oov ov- ova ovb ovh ovo ovv oya oyo v-a vaa vab vah van vao vav vay vba vbh vbo vbv vh- vha vhb vho vn- vna vno vnv voa vob voh von voo vov voy vva vvb vvo vvv vyn yaa yab yah yan yao yav yay yby yha yna ynn yny yob yon yoo yoy yva yvo yvy yyb yyy