-ic a-a a-b a-c a-i aaa aab aac aad aai aak aap aas ab- aba abb abc abd abi abk abp abs ac- aca acb acc acd aci ack acp acs ad- ada adb adc add adi adk adp ads ai- aia aib aic aid aii aik aip ais aka akb akc akd aki akk akp aks ap- apa apb apc apd api apk app aps as- asa asb asc asd asi ask asp ass b-p baa bab bac bad bai bak bap bas bba bbb bbc bbd bbi bbk bbp bbs bca bcb bcc bcd bci bck bcp bcs bda bdb bdc bdd bdi bdk bdp bds bi- bia bib bic bid bii bik bip bis bka bkb bkc bkk bkp bks bpa bpb bpc bpd bpi bpp bps bsa bsb bsc bsd bsi bsk bsp bss c-- caa cab cac cad cai cak cap cas cba cbb cbc cbd cbi cbk cbp cbs cca ccb ccc ccd cci cck ccp ccs cda cdb cdc cdd cdi cdk cdp cds ci- cia cib cic cid cii cik cip cis cka ckb ckc ckd cki cks cpa cpb cpc cpd cpi cpk cpp cps csa csb csc csd csi csk csp css daa dab dac dad dai dak dap das dba dbb dbc dbd dbi dbk dbp dbs dca dcb dcc dcd dci dck dcp dcs dda ddb ddc ddd ddi ddk ddp dds di- dia dib dic did dii dik dip dis dka dkb dkc dki dkk dkp dks dpa dpb dpc dpd dpi dpk dpp dps dsa dsb dsc dsd dsi dsk dsp dss i-d ia- iaa iab iac iad iai iap ias iba ibb ibc ibd ibi ibk ibp ibs ica icb icc icd ici ick icp ics ida idb idc idd idi idk idp ids iia iib iic iid iii iip iis ika ikb ikc iki ikk iks ipa ipb ipc ipd ipi ipp ips is- isa isb isc isd isi isk isp iss ka- kaa kab kac kad kai kak kap kas kba kbb kbc kbd kbi kbk kbp kbs kca kcb kcc kcd kci kck kcp kcs kda kdb kdc kdk kdp kds kia kib kic kid kii kik kip kis kkb kkc kki kkk kkp kks kpa kpc kpd kpi kpk kpp kps ksa ksb ksc ksd ksi ksk ksp kss p-p paa pab pac pad pai pak pap pas pba pbb pbc pbd pbi pbk pbp pbs pca pcb pcc pcd pci pck pcp pcs pda pdb pdc pdd pdi pdk pdp pds pia pib pic pid pii pik pip pis pka pkb pkc pkd pki pkp pks ppa ppb ppc ppd ppi ppk ppp pps ps- psa psb psc psd psi psk psp pss saa sab sac sad sai sak sap sas sba sbb sbc sbd sbi sbk sbp sbs sca scb scc scd sci sck scp scs sda sdb sdc sdd sdi sdk sdp sds sia sib sic sid sii sik sip sis sk- ska skb skc skd ski skk skp sks spa spb spc spd spi spk spp sps ss- ssa ssb ssc ssd ssi ssk ssp sss