-ic a-a a-b a-c a-i aaa aab aac aai aam aao aap aas ab- aba abb abc abi abm abo abp abs ac- aca acb acc aci acm aco acp acs ai- aia aib aic aii aim aio aip ais ama amb amc ami amm amo amp ams aoa aob aoc aoi aom aoo aop aos ap- apa apb apc api apm apo app aps as- asa asb asc asi asm aso asp ass b-p baa bab bac bai bam bao bap bas bba bbb bbc bbi bbm bbo bbp bbs bca bcb bcc bci bcm bco bcp bcs bi- bia bib bic bii bim bio bip bis bma bmb bmc bmi bmm bmo bmp bms boa bob boc boi bom boo bop bos bpa bpb bpc bpi bpm bpo bpp bps bsa bsb bsc bsi bsm bso bsp bss c-- caa cab cac cai cam cao cap cas cba cbb cbc cbi cbm cbo cbp cbs cca ccb ccc cci ccm cco ccp ccs ci- cia cib cic cii cim cio cip cis cma cmb cmc cmi cmm cmo cmp cms co- coa cob coc coi com coo cop cos cpa cpb cpc cpi cpm cpo cpp cps csa csb csc csi csm cso csp css ia- iaa iab iac iai iam iao iap ias iba ibb ibc ibi ibm ibo ibp ibs ica icb icc ici icm ico icp ics iia iib iic iii iim iio iip iis im- ima imb imc imi imm imo imp ims io- ioa iob ioc ioi iom ioo iop ios ipa ipb ipc ipi ipm ipo ipp ips is- isa isb isc isi ism iso isp iss m-o maa mab mac mai mam mao map mas mba mbb mbc mbi mbm mbo mbp mbs mc- mca mcb mcc mci mcm mco mcp mcs mi- mia mib mic mii mim mio mip mis mma mmb mmc mmi mmm mmo mmp mms moa mob moc moi mom moo mop mos mpa mpb mpc mpi mpm mpo mpp mps msa msb msc msi msm mso msp mss o-i oaa oab oac oai oam oao oap oas ob- oba obb obc obi obm obo obp obs oc- oca ocb occ oci ocm oco ocp ocs oia oib oic oii oim oio oip ois om- oma omb omc omi omm omo omp oms oo- ooa oob ooc ooi oom ooo oop oos op- opa opb opc opi opm opo opp ops os- osa osb osc osi osm oso osp oss p-p paa pab pac pai pam pao pap pas pba pbb pbc pbi pbm pbo pbp pbs pca pcb pcc pci pcm pco pcp pcs pia pib pic pii pim pio pip pis pma pmb pmc pmi pmm pmo pmp pms poa pob poc poi pom poo pop pos ppa ppb ppc ppi ppm ppo ppp pps ps- psa psb psc psi psm pso psp pss saa sab sac sai sam sao sap sas sba sbb sbc sbi sbm sbo sbp sbs sca scb scc sci scm sco scp scs sia sib sic sii sim sio sip sis sma smb smc smi smm smo smp sms soa sob soc soi som soo sop sos spa spb spc spi spm spo spp sps ss- ssa ssb ssc ssi ssm sso ssp sss