a-a aaa aam aao aar aas ama amm amo amr ams aoa aom aoo aor aos ar- ara arm aro arr ars as- asa asm aso asr ass m-o m-r maa mam mao mar mas mma mmm mmo mmr mms moa mom moo mor mos mra mrm mro mrr mrs msa msm mso msr mss oaa oam oao oar oas om- oma omm omo omr oms oo- ooa oom ooo oor oos or- ora orm oro orr ors os- osa osm oso osr oss ra- raa ram rao rar ras rma rmm rmo rmr rms roa rom roo ror ros rra rrm rrr rrs rsa rsm rso rsr rss saa sam sao sar sas sma smm smo smr sms soa som soo sor sos sr- sra srm sro srr srs ss- ssa ssm sso ssr sss