a-a a-b a-i aaa aab aai aam aao aap aas ab- aba abb abi abm abo abp abs ai- aia aib aii aim aio aip ais ama amb ami amm amo amp ams aoa aob aoi aom aoo aop aos ap- apa apb api apm apo app aps as- asa asb asi asm aso asp ass b-p baa bab bai bam bao bap bas bba bbb bbi bbm bbo bbp bbs bi- bia bib bii bim bio bip bis bma bmb bmi bmm bmo bmp bms boa bob boi bom boo bop bos bpa bpb bpi bpm bpo bpp bps bsa bsb bsi bsm bso bsp bss ia- iaa iab iai iam iao iap ias iba ibb ibi ibm ibo ibp ibs iia iib iii iim iio iip iis im- ima imb imi imm imo imp ims io- ioa iob ioi iom ioo iop ios ipa ipb ipi ipm ipo ipp ips is- isa isb isi ism iso isp iss m-o maa mab mai mam mao map mas mba mbb mbi mbm mbo mbp mbs mi- mia mib mii mim mio mip mis mma mmb mmi mmm mmo mmp mms moa mob moi mom moo mop mos mpa mpb mpi mpm mpo mpp mps msa msb msi msm mso msp mss o-i oaa oab oai oam oao oap oas ob- oba obb obi obm obo obp obs oia oib oii oim oio oip ois om- oma omb omi omm omo omp oms oo- ooa oob ooi oom ooo oop oos op- opa opb opi opm opo opp ops os- osa osb osi osm oso osp oss p-p paa pab pai pam pao pap pas pba pbb pbi pbm pbo pbp pbs pia pib pii pim pio pip pis pma pmb pmi pmm pmo pmp pms poa pob poi pom poo pop pos ppa ppb ppi ppm ppo ppp pps ps- psa psb psi psm pso psp pss saa sab sai sam sao sap sas sba sbb sbi sbm sbo sbp sbs sia sib sii sim sio sip sis sma smb smi smm smo smp sms soa sob soi som soo sop sos spa spb spi spm spo spp sps ss- ssa ssb ssi ssm sso ssp sss