a-a a-b a-i aaa aab aae aag aai aap aas ab- aba abb abe abg abi abp abs aea aeb aee aeg aei aep aes ag- aga agb age agg agi agp ags ai- aia aib aie aig aii aip ais ap- apa apb ape apg api app aps as- asa asb ase asg asi asp ass b-p baa bab bae bag bai bap bas bba bbb bbe bbg bbi bbp bbs be- bea beb bee beg bei bep bes bga bgb bge bgg bgi bgp bgs bi- bia bib bie big bii bip bis bpa bpb bpe bpg bpi bpp bps bsa bsb bse bsg bsi bsp bss eaa eab eae eag eai eap eas eba ebb ebe ebg ebi ebp ebs eea eeb eee eeg eep ees ega egb ege egg egi egp egs eia eib eie eig eii eip eis ep- epa epb epe epg epi epp eps es- esa esb ese esg esi esp ess g-p gaa gab gae gag gai gap gas gba gbe gbg gbi gbp gbs ge- gea geb gee geg gei gep ges gga ggb ggg ggi ggp ggs gia gib gie gig gii gip gis gpa gpb gpe gpg gpi gpp gps gsa gsb gse gsg gsi gsp gss ia- iaa iab iae iag iai iap ias iba ibb ibe ibg ibi ibp ibs ie- iea iee ieg iei iep ies iga igb ige igg igi igp igs iia iib iie iii iip iis ipa ipb ipe ipg ipi ipp ips is- isa isb ise isg isi isp iss p-p paa pab pae pag pai pap pas pba pbb pbe pbg pbi pbp pbs pea peb pee peg pei pep pes pga pgb pge pgg pgi pgp pgs pia pib pie pig pii pip pis ppa ppb ppe ppg ppi ppp pps ps- psa psb pse psg psi psp pss saa sab sae sag sai sap sas sba sbb sbe sbg sbi sbp sbs se- sea seb see seg sei sep ses sga sgb sge sgg sgi sgp sgs sia sib sie sig sii sip sis spa spb spe spg spi spp sps ss- ssa ssb sse ssg ssi ssp sss