a-a a-b a-i aaa aab aai aam aan aao aap aar aas ab- aba abb abi abm abn abo abp abr abs ai- aia aib aii aim ain aio aip air ais ama amb ami amm amn amo amp amr ams an- ana anb ani anm ann ano anp anr ans aoa aob aoi aom aon aoo aop aor aos ap- apa apb api apm apn apo app apr aps ar- ara arb ari arm arn aro arp arr ars as- asa asb asi asm asn aso asp asr ass b-p baa bab bai bam ban bao bap bar bas bba bbb bbi bbm bbn bbo bbp bbr bbs bi- bia bib bii bim bin bio bip bir bis bma bmb bmi bmm bmn bmo bmp bmr bms bna bnb bni bnn bno bnp bnr bns boa bob boi bom bon boo bop bor bos bpa bpb bpi bpm bpn bpo bpp bpr bps bra brb bri brm brn bro brp brr brs bsa bsb bsi bsm bsn bso bsp bsr bss ia- iaa iab iai iam ian iao iap iar ias iba ibb ibi ibm ibn ibo ibp ibr ibs iia iib iii iim iin iio iip iir iis im- ima imb imi imm imn imo imp ims in- ina inb ini inm inn ino inp inr ins io- ioa iob ioi iom ion ioo iop ior ios ipa ipb ipi ipm ipn ipo ipp ipr ips ir- ira irb iri irm irn iro irp irr irs is- isa isb isi ism isn iso isp isr iss m-o m-r maa mab mai mam man mao map mar mas mba mbb mbi mbm mbo mbp mbr mbs mi- mia mib mii mim min mio mip mir mis mma mmb mmi mmm mmn mmo mmp mmr mms mna mnb mni mnm mnn mno mnp mnr mns moa mob moi mom mon moo mop mor mos mpa mpb mpi mpm mpn mpo mpp mpr mps mra mrb mri mrm mrn mro mrp mrr mrs msa msb msi msm msn mso msp msr mss n-i naa nab nai nam nan nao nap nar nas nba nbb nbi nbm nbn nbo nbp nbr nbs nia nib nii nim nin nio nip nir nis nma nmb nmi nmm nmn nmo nmp nmr nms nna nnb nni nnm nnn nno nnp nns no- noa nob noi nom non noo nop nor nos npa npb npi npm npn npo npp npr nps nra nrb nri nrm nrn nro nrp nrr nrs nsa nsb nsi nsm nsn nso nsp nsr nss o-i oaa oab oai oam oan oao oap oar oas ob- oba obb obi obm obn obo obp obr obs oia oib oii oim oin oio oip oir ois om- oma omb omi omm omn omo omp omr oms on- ona onb oni onn ono onp onr ons oo- ooa oob ooi oom oon ooo oop oor oos op- opa opb opi opm opn opo opp opr ops or- ora orb ori orm orn oro orp orr ors os- osa osb osi osm osn oso osp osr oss p-p paa pab pai pam pan pao pap par pas pba pbb pbi pbm pbn pbo pbp pbr pbs pia pib pii pim pin pio pip pir pis pma pmb pmi pmm pmn pmo pmp pmr pms pn- pna pnb pni pnm pnn pno pnp pnr pns poa pob poi pom pon poo pop por pos ppa ppb ppi ppm ppn ppo ppp ppr pps pra prb pri prm prn pro prp prr prs ps- psa psb psi psm psn pso psp psr pss ra- raa rab rai ram ran rao rap rar ras rba rbb rbi rbm rbn rbo rbp rbr rbs ria rib rii rim rin rio rip rir ris rma rmb rmi rmm rmn rmo rmp rmr rms rna rnb rni rnm rnn rno rnp rnr rns roa rob roi rom ron roo rop ror ros rpa rpb rpi rpm rpn rpo rpp rpr rps rra rrb rri rrm rrn rrp rrr rrs rsa rsb rsi rsm rsn rso rsp rsr rss saa sab sai sam san sao sap sar sas sba sbb sbi sbm sbn sbo sbp sbr sbs sia sib sii sim sin sio sip sir sis sma smb smi smm smn smo smp smr sms sna snb sni snm snn sno snp snr sns soa sob soi som son soo sop sor sos spa spb spi spm spn spo spp spr sps sr- sra srb sri srm srn sro srp srr srs ss- ssa ssb ssi ssm ssn sso ssp ssr sss