-ic a-a a-b a-c a-i aaa aab aac aad aae aai aap aas ab- aba abb abc abd abe abi abp abs ac- aca acb acc acd ace aci acp acs ad- ada adb adc add ade adi adp ads aea aeb aec aed aee aei aep aes ai- aia aib aic aid aie aii aip ais ap- apa apb apc apd ape api app aps as- asa asb asc asd ase asi asp ass b-p baa bab bac bad bae bai bap bas bba bbb bbc bbd bbe bbi bbp bbs bca bcb bcc bcd bce bci bcp bcs bda bdb bdc bdd bde bdi bdp bds be- bea beb bec bed bee bei bep bes bi- bia bib bic bid bie bii bip bis bpa bpb bpc bpd bpe bpi bpp bps bsa bsb bsc bsd bse bsi bsp bss c-- caa cab cac cad cae cai cap cas cba cbb cbc cbd cbe cbi cbp cbs cca ccb ccc ccd cce cci ccp ccs cda cdb cdc cdd cde cdi cdp cds ce- cea ceb cec ced cee cei cep ces ci- cia cib cic cid cie cii cip cis cpa cpb cpc cpd cpe cpi cpp cps csa csb csc csd cse csi csp css daa dab dac dad dae dai dap das dba dbb dbc dbd dbe dbi dbp dbs dca dcb dcc dcd dce dci dcp dcs dda ddb ddc ddd dde ddi ddp dds de- dea deb dec ded dee dei dep des di- dia dib dic did die dii dip dis dpa dpb dpc dpd dpe dpi dpp dps dsa dsb dsc dsd dse dsi dsp dss eaa eab eac ead eae eai eap eas eba ebb ebc ebd ebe ebi ebp ebs ec- eca ecb ecc ecd ece eci ecs ed- eda edb edc edd ede edi edp eds eea eeb eec eed eee eep ees eia eib eic eid eie eii eip eis ep- epa epb epc epd epe epi epp eps es- esa esb esc esd ese esi esp ess i-d ia- iaa iab iac iad iae iai iap ias iba ibb ibc ibd ibe ibi ibp ibs ica icb icc icd ice ici icp ics ida idb idc idd ide idi idp ids ie- iea iec ied iee iei iep ies iia iib iic iid iie iii iip iis ipa ipb ipc ipd ipe ipi ipp ips is- isa isb isc isd ise isi isp iss p-p paa pab pac pad pae pai pap pas pba pbb pbc pbd pbe pbi pbp pbs pca pcb pcc pcd pce pci pcp pcs pda pdb pdc pdd pde pdi pdp pds pea peb pec ped pee pei pep pes pia pib pic pid pie pii pip pis ppa ppb ppc ppd ppe ppi ppp pps ps- psa psb psc psd pse psi psp pss saa sab sac sad sae sai sap sas sba sbb sbc sbd sbe sbi sbp sbs sca scb scc scd sce sci scp scs sda sdb sdc sdd sde sdi sdp sds se- sea seb sec sed see sei sep ses sia sib sic sid sie sii sip sis spa spb spc spd spe spi spp sps ss- ssa ssb ssc ssd sse ssi ssp sss