a-a a-c aaa aac aah aan aao aar aax ac- aca acc ach acn aco acr acx aha ahc ahh ahn aho ahr ahx an- ana anc anh ann ano anr anx aoa aoc aoh aon aoo aor aox ar- ara arc arh arn aro arr arx ax- axa axh axn axo axr axx c-- caa cac cah can cao car cax cca ccc cch ccn cco ccr ccx ch- cha chc chh chn cho chr chx cn- cna cnc cnh cnn cno cnr cnx co- coa coc coh con coo cor cox cra crc crh crn cro crr crx cxc cxh cxo cxr cxx haa hac hah han hao har hax hca hcc hch hcn hco hcr hha hhc hhh hhn hho hhr hna hnc hnh hnn hno hoa hoc hoh hon hoo hor hox hr- hra hrc hrh hrn hro hrr hxc naa nac nah nan nao nar nax nca ncc nch ncn nco ncr ncx nha nhc nhh nhn nhr nna nnc nnh nnn nno no- noa noc noh non noo nor nox nra nrc nrn nro nrr nrx nxc oaa oac oah oan oao oar oax oc- oca occ och ocn oco ocr ocx oha ohc ohh ohn oho ohr on- ona onc onh onn ono onr onx oo- ooa ooc ooh oon ooo oor oox or- ora orc orh orn oro orr orx ox- oxa oxc oxn oxo oxx ra- raa rac rah ran rao rar rax rca rcc rch rcn rco rcr rcx rh- rha rhc rhh rhn rho rhr rna rnc rnh rnn rno rnr roa roc roh ron roo ror rox rra rrc rrh rrn rrr rxr xaa xac xan xar xch xcr xcx xna xnc xno xoa xoc xon xoo xor xox xrc xrx xxo xxx