a-a a-c aaa aac aan aar aax aay ac- aca acc acn acr acx acy an- ana anc ann anr anx any ar- ara arc arn arr arx ary ax- axa axn axr axx ay- aya ayc ayn ayr ayx c-- caa cac can car cax cay cca ccc ccn ccr ccx cn- cna cnc cnn cnr cnx cny cra crc crn crr crx cry cxc cxr cxx cya cyc cyn cyr naa nac nan nar nax nay nca ncc ncn ncr ncx nna nnc nnn nra nrc nrn nrr nrx nry nxc nya nyc nyn nyx nyy ra- raa rac ran rar rax ray rca rcc rcn rcr rcx rna rnc rnn rnr rny rra rrc rrn rrr rxr ry- rya ryc ryn ryr ryy xaa xac xan xar xcr xcx xna xnc xrc xrx xry xxx xxy xyr xyy yaa yac yan yar yax yay yca ycc ycy yna ynn yny yra yrc yrn yxa yxy yyc yyy