-ic a-a a-b a-c a-i aaa aab aac aad aai aap aas ab- aba abb abc abd abi abp abs ac- aca acb acc acd aci acp acs ad- ada adb adc add adi adp ads ai- aia aib aic aid aii aip ais ap- apa apb apc apd api app aps as- asa asb asc asd asi asp ass b-p baa bab bac bad bai bap bas bba bbb bbc bbd bbi bbp bbs bca bcb bcc bcd bci bcp bcs bda bdb bdc bdd bdi bdp bds bi- bia bib bic bid bii bip bis bpa bpb bpc bpd bpi bpp bps bsa bsb bsc bsd bsi bsp bss c-- caa cab cac cad cai cap cas cba cbb cbc cbd cbi cbp cbs cca ccb ccc ccd cci ccp ccs cda cdb cdc cdd cdi cdp cds ci- cia cib cic cid cii cip cis cpa cpb cpc cpd cpi cpp cps csa csb csc csd csi csp css daa dab dac dad dai dap das dba dbb dbc dbd dbi dbp dbs dca dcb dcc dcd dci dcp dcs dda ddb ddc ddd ddi ddp dds di- dia dib dic did dii dip dis dpa dpb dpc dpd dpi dpp dps dsa dsb dsc dsd dsi dsp dss i-d ia- iaa iab iac iad iai iap ias iba ibb ibc ibd ibi ibp ibs ica icb icc icd ici icp ics ida idb idc idd idi idp ids iia iib iic iid iii iip iis ipa ipb ipc ipd ipi ipp ips is- isa isb isc isd isi isp iss p-p paa pab pac pad pai pap pas pba pbb pbc pbd pbi pbp pbs pca pcb pcc pcd pci pcp pcs pda pdb pdc pdd pdi pdp pds pia pib pic pid pii pip pis ppa ppb ppc ppd ppi ppp pps ps- psa psb psc psd psi psp pss saa sab sac sad sai sap sas sba sbb sbc sbd sbi sbp sbs sca scb scc scd sci scp scs sda sdb sdc sdd sdi sdp sds sia sib sic sid sii sip sis spa spb spc spd spi spp sps ss- ssa ssb ssc ssd ssi ssp sss