a-a a-b a-i aaa aab aae aag aai aan aap aas ab- aba abb abe abg abi abn abp abs aea aeb aee aeg aei aen aep aes ag- aga agb age agg agi agn agp ags ai- aia aib aie aig aii ain aip ais an- ana anb ane ang ani ann anp ans ap- apa apb ape apg api apn app aps as- asa asb ase asg asi asn asp ass b-p baa bab bae bag bai ban bap bas bba bbb bbe bbg bbi bbn bbp bbs be- bea beb bee beg bei ben bep bes bga bgb bge bgg bgi bgn bgp bgs bi- bia bib bie big bii bin bip bis bna bnb bne bng bni bnn bnp bns bpa bpb bpe bpg bpi bpn bpp bps bsa bsb bse bsg bsi bsn bsp bss eaa eab eae eag eai ean eap eas eba ebb ebe ebg ebi ebn ebp ebs eea eeb eee eeg een eep ees ega egb ege egg egi egn egp egs eia eib eie eig eii ein eip eis en- ena enb ene eng eni enn enp ens ep- epa epb epe epg epi epn epp eps es- esa esb ese esg esi esn esp ess g-p gaa gab gae gag gai gan gap gas gba gbe gbg gbi gbn gbp gbs ge- gea geb gee geg gei gen gep ges gga ggb ggg ggi ggn ggp ggs gia gib gie gig gii gin gip gis gna gnb gne gni gnn gnp gns gpa gpb gpe gpg gpi gpn gpp gps gsa gsb gse gsg gsi gsn gsp gss ia- iaa iab iae iag iai ian iap ias iba ibb ibe ibg ibi ibn ibp ibs ie- iea iee ieg iei ien iep ies iga igb ige igg igi ign igp igs iia iib iie iii iin iip iis in- ina inb ine ing ini inn inp ins ipa ipb ipe ipg ipi ipn ipp ips is- isa isb ise isg isi isn isp iss n-i naa nab nae nag nai nan nap nas nba nbb nbe nbg nbi nbn nbp nbs ne- nea neb nee neg nei nen nep nes nga ngb nge ngg ngi ngn ngp ngs nia nib nie nig nii nin nip nis nna nnb nne nng nni nnn nnp nns npa npb npe npg npi npn npp nps nsa nsb nse nsg nsi nsn nsp nss p-p paa pab pae pag pai pan pap pas pba pbb pbe pbg pbi pbn pbp pbs pea peb pee peg pei pen pep pes pga pgb pge pgg pgi pgn pgp pgs pia pib pie pig pii pin pip pis pn- pna pnb pne png pni pnn pnp pns ppa ppb ppe ppg ppi ppn ppp pps ps- psa psb pse psg psi psn psp pss saa sab sae sag sai san sap sas sba sbb sbe sbg sbi sbn sbp sbs se- sea seb see seg sei sen sep ses sga sgb sge sgg sgi sgn sgp sgs sia sib sie sig sii sin sip sis sna snb sne sng sni snn snp sns spa spb spe spg spi spn spp sps ss- ssa ssb sse ssg ssi ssn ssp sss