a-a a-c aaa aac aah aap aax ac- aca acc ach acp acx aha ahc ahh ahp ahx ap- apa apc aph app apx ax- axa axh axp axx c-- caa cac cah cap cax cca ccc cch ccp ccx ch- cha chc chh chp chx cpa cpc cph cpp cpx cxc cxh cxp cxx haa hac hah hap hax hca hcc hch hcp hha hhc hhh hhp hpa hpc hph hpp hxc p-p paa pac pah pap pax pca pcc pch pcp pcx pha phc php phx ppa ppc pph ppp ppx pxc xaa xac xap xch xcp xcx xhp xpa xpc xpp xxp xxx