a-a a-c aaa aac aah aan aao aax aay ac- aca acc ach acn aco acx acy aha ahc ahh ahn aho ahx ahy an- ana anc anh ann ano anx any aoa aoc aoh aon aoo aox ax- axa axh axn axo axx ay- aya ayc ayh ayn ayo ayx c-- caa cac cah can cao cax cay cca ccc cch ccn cco ccx ch- cha chc chh chn cho chx chy cn- cna cnc cnh cnn cno cnx cny co- coa coc coh con coo cox coy cxc cxh cxo cxx cya cyc cyn cyo haa hac hah han hao hax hay hca hcc hch hcn hco hcy hha hhc hhh hhn hho hhy hna hnc hnh hnn hno hny hoa hoc hoh hon hoo hox hoy hxc hy- hya hyc hyh hyn hyo hyy naa nac nah nan nao nax nay nca ncc nch ncn nco ncx nha nhc nhh nhn nhy nna nnc nnh nnn nno no- noa noc noh non noo nox noy nxc nya nyc nyn nyo nyx nyy oaa oac oah oan oao oax oc- oca occ och ocn oco ocx oha ohc ohh ohn oho on- ona onc onh onn ono onx ony oo- ooa ooc ooh oon ooo oox ox- oxa oxc oxn oxo oxx oxy oya oyo xaa xac xan xch xcx xna xnc xno xoa xoc xon xoo xox xxo xxx xxy xyy yaa yac yah yan yao yax yay yca ycc ych yco ycy yha yhc yna ynn yny yoc yon yoo yox yoy yxa yxy yyc yyy