-ic a-a a-b a-c a-i aaa aab aac aad aae aai aao aap aas ab- aba abb abc abd abe abi abo abp abs ac- aca acb acc acd ace aci aco acp acs ad- ada adb adc add ade adi ado adp ads aea aeb aec aed aee aei aeo aep aes ai- aia aib aic aid aie aii aio aip ais aoa aob aoc aod aoe aoi aoo aop aos ap- apa apb apc apd ape api apo app aps as- asa asb asc asd ase asi aso asp ass b-p baa bab bac bad bae bai bao bap bas bba bbb bbc bbd bbe bbi bbo bbp bbs bca bcb bcc bcd bce bci bco bcp bcs bda bdb bdc bdd bde bdi bdo bdp bds be- bea beb bec bed bee bei beo bep bes bi- bia bib bic bid bie bii bio bip bis boa bob boc bod boe boi boo bop bos bpa bpb bpc bpd bpe bpi bpo bpp bps bsa bsb bsc bsd bse bsi bso bsp bss c-- caa cab cac cad cae cai cao cap cas cba cbb cbc cbd cbe cbi cbo cbp cbs cca ccb ccc ccd cce cci cco ccp ccs cda cdb cdc cdd cde cdi cdo cdp cds ce- cea ceb cec ced cee cei ceo cep ces ci- cia cib cic cid cie cii cio cip cis co- coa cob coc cod coe coi coo cop cos cpa cpb cpc cpd cpe cpi cpo cpp cps csa csb csc csd cse csi cso csp css daa dab dac dad dae dai dao dap das dba dbb dbc dbd dbe dbi dbo dbp dbs dca dcb dcc dcd dce dci dco dcp dcs dda ddb ddc ddd dde ddi ddo ddp dds de- dea deb dec ded dee dei deo dep des di- dia dib dic did die dii dio dip dis doa dob doc dod doe doi doo dop dos dpa dpb dpc dpd dpe dpi dpo dpp dps dsa dsb dsc dsd dse dsi dso dsp dss eaa eab eac ead eae eai eao eap eas eba ebb ebc ebd ebe ebi ebo ebp ebs ec- eca ecb ecc ecd ece eci eco ecs ed- eda edb edc edd ede edi edo edp eds eea eeb eec eed eee eeo eep ees eia eib eic eid eie eii eio eip eis eo- eoa eob eoc eod eoe eoi eoo eop eos ep- epa epb epc epd epe epi epo epp eps es- esa esb esc esd ese esi eso esp ess i-d ia- iaa iab iac iad iae iai iao iap ias iba ibb ibc ibd ibe ibi ibo ibp ibs ica icb icc icd ice ici ico icp ics ida idb idc idd ide idi ido idp ids ie- iea iec ied iee iei iep ies iia iib iic iid iie iii iio iip iis io- ioa iob ioc iod ioe ioi ioo iop ios ipa ipb ipc ipd ipe ipi ipo ipp ips is- isa isb isc isd ise isi iso isp iss o-i oaa oab oac oad oae oai oao oap oas ob- oba obb obc obd obe obi obo obp obs oc- oca ocb occ ocd oci oco ocp ocs oda odb odc odd ode odi odo odp ods oea oeb oec oed oee oei oeo oep oes oia oib oic oid oie oii oio oip ois oo- ooa oob ooc ood ooi ooo oop oos op- opa opb opc opd ope opi opo opp ops os- osa osb osc osd ose osi oso osp oss p-p paa pab pac pad pae pai pao pap pas pba pbb pbc pbd pbe pbi pbo pbp pbs pca pcb pcc pcd pce pci pco pcp pcs pda pdb pdc pdd pde pdi pdo pdp pds pea peb pec ped pee pei peo pep pes pia pib pic pid pie pii pio pip pis poa pob poc pod poe poi poo pop pos ppa ppb ppc ppd ppe ppi ppo ppp pps ps- psa psb psc psd pse psi pso psp pss saa sab sac sad sae sai sao sap sas sba sbb sbc sbd sbe sbi sbo sbp sbs sca scb scc scd sce sci sco scp scs sda sdb sdc sdd sde sdi sdo sdp sds se- sea seb sec sed see sei seo sep ses sia sib sic sid sie sii sio sip sis soa sob soc sod soe soi soo sop sos spa spb spc spd spe spi spo spp sps ss- ssa ssb ssc ssd sse ssi sso ssp sss