a-a a-c aaa aac aah aao aar aax aay ac- aca acc ach aco acr acx acy aha ahc ahh aho ahr ahx ahy aoa aoc aoh aoo aor aox ar- ara arc arh aro arr arx ary ax- axa axh axo axr axx ay- aya ayc ayh ayo ayr ayx c-- caa cac cah cao car cax cay cca ccc cch cco ccr ccx ch- cha chc chh cho chr chx chy co- coa coc coh coo cor cox coy cra crc crh cro crr crx cry cxc cxh cxo cxr cxx cya cyc cyo cyr haa hac hah hao har hax hay hca hcc hch hco hcr hcy hha hhc hhh hho hhr hhy hoa hoc hoh hoo hor hox hoy hr- hra hrc hrh hro hrr hxc hy- hya hyc hyh hyo hyr hyy oaa oac oah oao oar oax oc- oca occ och oco ocr ocx oha ohc ohh oho ohr oo- ooa ooc ooh ooo oor oox or- ora orc orh oro orr orx ory ox- oxa oxc oxo oxx oxy oya oyo ra- raa rac rah rao rar rax ray rca rcc rch rco rcr rcx rh- rha rhc rhh rho rhr roa roc roh roo ror rox roy rra rrc rrh rrr rxr ry- rya ryc ryo ryr ryy xaa xac xar xch xcr xcx xoa xoc xoo xor xox xrc xrx xry xxo xxx xxy xyr xyy yaa yac yah yao yar yax yay yca ycc ych yco ycy yha yhc yoc yoo yor yox yoy yra yrc yro yxa yxy yyc yyy