-ic a-a a-c a-i aaa aac aai aak aan aao aap ac- aca acc aci ack acn aco acp ai- aia aic aii aik ain aio aip aka akc aki akk akn ako akp an- ana anc ani ank ann ano anp aoa aoc aoi aok aon aoo aop ap- apa apc api apk apn apo app c-- caa cac cai cak can cao cap cca ccc cci cck ccn cco ccp ci- cia cic cii cik cin cio cip cka ckc cki cko cn- cna cnc cni cnn cno cnp co- coa coc coi cok con coo cop cpa cpc cpi cpk cpn cpo cpp ia- iaa iac iai ian iao iap ica icc ici ick icn ico icp iia iic iii iin iio iip ika ikc iki ikk iko in- ina inc ini ink inn ino inp io- ioa ioc ioi ion ioo iop ipa ipc ipi ipn ipo ipp ka- kaa kac kai kak kan kao kap kca kcc kci kck kcn kcp kia kic kii kik kin kio kip kkc kki kkk kkn kkp kn- kna knc kni knk knn kno knp koa koc koi kok kon koo kop kpa kpc kpi kpk kpn kpo kpp n-i naa nac nai nak nan nao nap nca ncc nci nck ncn nco ncp nia nic nii nik nin nio nip nka nkc nki nkk nkn nko nkp nna nnc nni nnk nnn nno nnp no- noa noc noi nok non noo nop npa npc npi npn npo npp o-i oaa oac oai oak oan oao oap oc- oca occ oci ock ocn oco ocp oia oic oii oik oin oio oip oka okc oki okk oko okp on- ona onc oni onk onn ono onp oo- ooa ooc ooi ook oon ooo oop op- opa opc opi opk opn opo opp p-p paa pac pai pak pan pao pap pca pcc pci pck pcn pco pcp pia pic pii pik pin pio pip pka pkc pki pkn pko pkp pn- pna pnc pni pnk pnn pno pnp poa poc poi pok pon poo pop ppa ppc ppi ppk ppn ppo ppp