a-a a-b aaa aab aan aao aaw aay ab- aba abb abn abo abw aby an- ana anb ann ano any aoa aob aon aoo aow aw- awa awb awn awo aww awy ay- aya ayn ayo ayw baa bab ban bao baw bay bba bbb bbn bbo bbw bby bna bnb bnn bno bnw boa bob bon boo bow boy bwa bwb bwo bwy by- bya byn byo naa nab nan nao naw nay nba nbb nbn nbo nbw nna nnb nnn nno nnw no- noa nob non noo now noy nwa nwb nwn nwo nya nyn nyo nyy oaa oab oan oao oaw ob- oba obb obn obo obw oby on- ona onb onn ono ony oo- ooa oob oon ooo oow owa owb own owo oww oya oyo waa wab wan wao waw way wba wbb wbn wbo wbw wn- wna wnn wno wnw wny woa wob won woo wow woy wwa wwn wwo www wy- wya wyn wyo yaa yab yan yao yaw yay yby yna ynn yny yob yon yoo yow yoy yyb yyy