a-a a-b a-i aaa aab aae aai aam aan aao aap aas ab- aba abb abe abi abm abn abo abp abs aea aeb aee aei aem aen aeo aep aes ai- aia aib aie aii aim ain aio aip ais ama amb ame ami amm amn amo amp ams an- ana anb ane ani anm ann ano anp ans aoa aob aoe aoi aom aon aoo aop aos ap- apa apb ape api apm apn apo app aps as- asa asb ase asi asm asn aso asp ass b-p baa bab bae bai bam ban bao bap bas bba bbb bbe bbi bbm bbn bbo bbp bbs be- bea beb bee bei bem ben beo bep bes bi- bia bib bie bii bim bin bio bip bis bma bmb bme bmi bmm bmn bmo bmp bms bna bnb bne bni bnn bno bnp bns boa bob boe boi bom bon boo bop bos bpa bpb bpe bpi bpm bpn bpo bpp bps bsa bsb bse bsi bsm bsn bso bsp bss eaa eab eae eai eam ean eao eap eas eba ebb ebe ebi ebm ebn ebo ebp ebs eea eeb eee eem een eeo eep ees eia eib eie eii eim ein eio eip eis em- ema emb eme emi emm emn emo emp ems en- ena enb ene eni enm enn eno enp ens eo- eoa eob eoe eoi eom eon eoo eop eos ep- epa epb epe epi epm epn epo epp eps es- esa esb ese esi esm esn eso esp ess ia- iaa iab iae iai iam ian iao iap ias iba ibb ibe ibi ibm ibn ibo ibp ibs ie- iea iee iei iem ien iep ies iia iib iie iii iim iin iio iip iis im- ima imb ime imi imm imn imo imp ims in- ina inb ine ini inm inn ino inp ins io- ioa iob ioe ioi iom ion ioo iop ios ipa ipb ipe ipi ipm ipn ipo ipp ips is- isa isb ise isi ism isn iso isp iss m-o maa mab mae mai mam man mao map mas mba mbb mbe mbi mbm mbo mbp mbs mea meb mee mei mem men meo mep mes mi- mia mib mie mii mim min mio mip mis mma mmb mme mmi mmm mmn mmo mmp mms mna mnb mne mni mnm mnn mno mnp mns moa mob moe moi mom mon moo mop mos mpa mpb mpe mpi mpm mpn mpo mpp mps msa msb mse msi msm msn mso msp mss n-i naa nab nae nai nam nan nao nap nas nba nbb nbe nbi nbm nbn nbo nbp nbs ne- nea neb nee nei nem nen neo nep nes nia nib nie nii nim nin nio nip nis nma nmb nme nmi nmm nmn nmo nmp nms nna nnb nne nni nnm nnn nno nnp nns no- noa nob noe noi nom non noo nop nos npa npb npe npi npm npn npo npp nps nsa nsb nse nsi nsm nsn nso nsp nss o-i oaa oab oae oai oam oan oao oap oas ob- oba obb obe obi obm obn obo obp obs oea oeb oee oei oem oen oeo oep oes oia oib oie oii oim oin oio oip ois om- oma omb ome omi omm omn omo omp oms on- ona onb one oni onn ono onp ons oo- ooa oob ooi oom oon ooo oop oos op- opa opb ope opi opm opn opo opp ops os- osa osb ose osi osm osn oso osp oss p-p paa pab pae pai pam pan pao pap pas pba pbb pbe pbi pbm pbn pbo pbp pbs pea peb pee pei pem pen peo pep pes pia pib pie pii pim pin pio pip pis pma pmb pme pmi pmm pmn pmo pmp pms pn- pna pnb pne pni pnm pnn pno pnp pns poa pob poe poi pom pon poo pop pos ppa ppb ppe ppi ppm ppn ppo ppp pps ps- psa psb pse psi psm psn pso psp pss saa sab sae sai sam san sao sap sas sba sbb sbe sbi sbm sbn sbo sbp sbs se- sea seb see sei sem sen seo sep ses sia sib sie sii sim sin sio sip sis sma smb sme smi smm smn smo smp sms sna snb sne sni snm snn sno snp sns soa sob soe soi som son soo sop sos spa spb spe spi spm spn spo spp sps ss- ssa ssb sse ssi ssm ssn sso ssp sss