-ic a-a a-c a-i aaa aac aai aao aap aax aay ac- aca acc aci aco acp acx acy ai- aia aic aii aio aip aix aiy aoa aoc aoi aoo aop aox ap- apa apc api apo app apx apy ax- axa axi axo axp axx ay- aya ayc ayi ayo ayp ayx c-- caa cac cai cao cap cax cay cca ccc cci cco ccp ccx ci- cia cic cii cio cip cix co- coa coc coi coo cop cox coy cpa cpc cpi cpo cpp cpx cxc cxi cxo cxp cxx cya cyc cyo cyp ia- iaa iac iai iao iap ica icc ici ico icp icy iia iic iii iio iip iix io- ioa ioc ioi ioo iop ipa ipc ipi ipo ipp ipx ipy ixc ixi ixy iya iyc iyo iyy o-i oaa oac oai oao oap oax oc- oca occ oci oco ocp ocx oia oic oii oio oip oo- ooa ooc ooi ooo oop oox op- opa opc opi opo opp opx opy ox- oxa oxc oxi oxo oxx oxy oya oyi oyo p-p paa pac pai pao pap pax pay pca pcc pci pco pcp pcx pia pic pii pio pip pix poa poc poi poo pop pox poy ppa ppc ppi ppo ppp ppx pxc py- pya pyc pyo pyx xaa xac xap xci xcp xcx xia xic xii xio xix xoa xoc xoi xoo xop xox xpa xpc xpo xpp xxi xxo xxp xxx xxy xyp xyy yaa yac yai yao yap yax yay yca ycc yci yco ycp ycy yii yio yip yoc yoi yoo yop yox yoy ypa ypo yxa yxy yyc yyy