a-a a-b a-i aaa aab aai aam aap aar aas ab- aba abb abi abm abp abr abs ai- aia aib aii aim aip air ais ama amb ami amm amp amr ams ap- apa apb api apm app apr aps ar- ara arb ari arm arp arr ars as- asa asb asi asm asp asr ass b-p baa bab bai bam bap bar bas bba bbb bbi bbm bbp bbr bbs bi- bia bib bii bim bip bir bis bma bmb bmi bmm bmp bmr bms bpa bpb bpi bpm bpp bpr bps bra brb bri brm brp brr brs bsa bsb bsi bsm bsp bsr bss ia- iaa iab iai iam iap iar ias iba ibb ibi ibm ibp ibr ibs iia iib iii iim iip iir iis im- ima imb imi imm imp ims ipa ipb ipi ipm ipp ipr ips ir- ira irb iri irm irp irr irs is- isa isb isi ism isp isr iss m-r maa mab mai mam map mar mas mba mbb mbi mbm mbp mbr mbs mi- mia mib mii mim mip mir mis mma mmb mmi mmm mmp mmr mms mpa mpb mpi mpm mpp mpr mps mra mrb mri mrm mrp mrr mrs msa msb msi msm msp msr mss p-p paa pab pai pam pap par pas pba pbb pbi pbm pbp pbr pbs pia pib pii pim pip pir pis pma pmb pmi pmm pmp pmr pms ppa ppb ppi ppm ppp ppr pps pra prb pri prm prp prr prs ps- psa psb psi psm psp psr pss ra- raa rab rai ram rap rar ras rba rbb rbi rbm rbp rbr rbs ria rib rii rim rip rir ris rma rmb rmi rmm rmp rmr rms rpa rpb rpi rpm rpp rpr rps rra rrb rri rrm rrp rrr rrs rsa rsb rsi rsm rsp rsr rss saa sab sai sam sap sar sas sba sbb sbi sbm sbp sbr sbs sia sib sii sim sip sir sis sma smb smi smm smp smr sms spa spb spi spm spp spr sps sr- sra srb sri srm srp srr srs ss- ssa ssb ssi ssm ssp ssr sss