a-a a-b a-i aaa aab aag aai aan aao aap aas ab- aba abb abg abi abn abo abp abs ag- aga agb agg agi agn ago agp ags ai- aia aib aig aii ain aio aip ais an- ana anb ang ani ann ano anp ans aoa aob aog aoi aon aoo aop aos ap- apa apb apg api apn apo app aps as- asa asb asg asi asn aso asp ass b-p baa bab bag bai ban bao bap bas bba bbb bbg bbi bbn bbo bbp bbs bga bgb bgg bgi bgn bgo bgp bgs bi- bia bib big bii bin bio bip bis bna bnb bng bni bnn bno bnp bns boa bob bog boi bon boo bop bos bpa bpb bpg bpi bpn bpo bpp bps bsa bsb bsg bsi bsn bso bsp bss g-p gaa gab gag gai gan gao gap gas gba gbg gbi gbn gbo gbp gbs gga ggb ggg ggi ggn ggo ggp ggs gia gib gig gii gin gio gip gis gna gnb gni gnn gno gnp gns goa gob gog goi gon goo gop gos gpa gpb gpg gpi gpn gpo gpp gps gsa gsb gsg gsi gsn gso gsp gss ia- iaa iab iag iai ian iao iap ias iba ibb ibg ibi ibn ibo ibp ibs iga igb igg igi ign igo igp igs iia iib iii iin iio iip iis in- ina inb ing ini inn ino inp ins io- ioa iob iog ioi ion ioo iop ios ipa ipb ipg ipi ipn ipo ipp ips is- isa isb isg isi isn iso isp iss n-i naa nab nag nai nan nao nap nas nba nbb nbg nbi nbn nbo nbp nbs nga ngb ngg ngi ngn ngo ngp ngs nia nib nig nii nin nio nip nis nna nnb nng nni nnn nno nnp nns no- noa nob nog noi non noo nop nos npa npb npg npi npn npo npp nps nsa nsb nsg nsi nsn nso nsp nss o-i oaa oab oag oai oan oao oap oas ob- oba obb obg obi obn obo obp obs oga ogg ogi ogn ogo ogp ogs oia oib oii oin oio oip ois on- ona onb ong oni onn ono onp ons oo- ooa oob oog ooi oon ooo oop oos op- opa opb opg opi opn opo opp ops os- osa osb osg osi osn oso osp oss p-p paa pab pag pai pan pao pap pas pba pbb pbg pbi pbn pbo pbp pbs pga pgb pgg pgi pgn pgo pgp pgs pia pib pig pii pin pio pip pis pn- pna pnb png pni pnn pno pnp pns poa pob pog poi pon poo pop pos ppa ppb ppg ppi ppn ppo ppp pps ps- psa psb psg psi psn pso psp pss saa sab sag sai san sao sap sas sba sbb sbg sbi sbn sbo sbp sbs sga sgb sgg sgi sgn sgo sgp sgs sia sib sig sii sin sio sip sis sna snb sng sni snn sno snp sns soa sob sog soi son soo sop sos spa spb spg spi spn spo spp sps ss- ssa ssb ssg ssi ssn sso ssp sss