a-a a-b a-i aaa aab aai aam aan aap aar aas ab- aba abb abi abm abn abp abr abs ai- aia aib aii aim ain aip air ais ama amb ami amm amn amp amr ams an- ana anb ani anm ann anp anr ans ap- apa apb api apm apn app apr aps ar- ara arb ari arm arn arp arr ars as- asa asb asi asm asn asp asr ass b-p baa bab bai bam ban bap bar bas bba bbb bbi bbm bbn bbp bbr bbs bi- bia bib bii bim bin bip bir bis bma bmb bmi bmm bmn bmp bmr bms bna bnb bni bnn bnp bnr bns bpa bpb bpi bpm bpn bpp bpr bps bra brb bri brm brn brp brr brs bsa bsb bsi bsm bsn bsp bsr bss ia- iaa iab iai iam ian iap iar ias iba ibb ibi ibm ibn ibp ibr ibs iia iib iii iim iin iip iir iis im- ima imb imi imm imn imp ims in- ina inb ini inm inn inp inr ins ipa ipb ipi ipm ipn ipp ipr ips ir- ira irb iri irm irn irp irr irs is- isa isb isi ism isn isp isr iss m-r maa mab mai mam man map mar mas mba mbb mbi mbm mbp mbr mbs mi- mia mib mii mim min mip mir mis mma mmb mmi mmm mmn mmp mmr mms mna mnb mni mnm mnn mnp mnr mns mpa mpb mpi mpm mpn mpp mpr mps mra mrb mri mrm mrn mrp mrr mrs msa msb msi msm msn msp msr mss n-i naa nab nai nam nan nap nar nas nba nbb nbi nbm nbn nbp nbr nbs nia nib nii nim nin nip nir nis nma nmb nmi nmm nmn nmp nmr nms nna nnb nni nnm nnn nnp nns npa npb npi npm npn npp npr nps nra nrb nri nrm nrn nrp nrr nrs nsa nsb nsi nsm nsn nsp nsr nss p-p paa pab pai pam pan pap par pas pba pbb pbi pbm pbn pbp pbr pbs pia pib pii pim pin pip pir pis pma pmb pmi pmm pmn pmp pmr pms pn- pna pnb pni pnm pnn pnp pnr pns ppa ppb ppi ppm ppn ppp ppr pps pra prb pri prm prn prp prr prs ps- psa psb psi psm psn psp psr pss ra- raa rab rai ram ran rap rar ras rba rbb rbi rbm rbn rbp rbr rbs ria rib rii rim rin rip rir ris rma rmb rmi rmm rmn rmp rmr rms rna rnb rni rnm rnn rnp rnr rns rpa rpb rpi rpm rpn rpp rpr rps rra rrb rri rrm rrn rrp rrr rrs rsa rsb rsi rsm rsn rsp rsr rss saa sab sai sam san sap sar sas sba sbb sbi sbm sbn sbp sbr sbs sia sib sii sim sin sip sir sis sma smb smi smm smn smp smr sms sna snb sni snm snn snp snr sns spa spb spi spm spn spp spr sps sr- sra srb sri srm srn srp srr srs ss- ssa ssb ssi ssm ssn ssp ssr sss