a-a a-b a-i aaa aab aad aae aai aap aas ab- aba abb abd abe abi abp abs ad- ada adb add ade adi adp ads aea aeb aed aee aei aep aes ai- aia aib aid aie aii aip ais ap- apa apb apd ape api app aps as- asa asb asd ase asi asp ass b-p baa bab bad bae bai bap bas bba bbb bbd bbe bbi bbp bbs bda bdb bdd bde bdi bdp bds be- bea beb bed bee bei bep bes bi- bia bib bid bie bii bip bis bpa bpb bpd bpe bpi bpp bps bsa bsb bsd bse bsi bsp bss daa dab dad dae dai dap das dba dbb dbd dbe dbi dbp dbs dda ddb ddd dde ddi ddp dds de- dea deb ded dee dei dep des di- dia dib did die dii dip dis dpa dpb dpd dpe dpi dpp dps dsa dsb dsd dse dsi dsp dss eaa eab ead eae eai eap eas eba ebb ebd ebe ebi ebp ebs ed- eda edb edd ede edi edp eds eea eeb eed eee eep ees eia eib eid eie eii eip eis ep- epa epb epd epe epi epp eps es- esa esb esd ese esi esp ess i-d ia- iaa iab iad iae iai iap ias iba ibb ibd ibe ibi ibp ibs ida idb idd ide idi idp ids ie- iea ied iee iei iep ies iia iib iid iie iii iip iis ipa ipb ipd ipe ipi ipp ips is- isa isb isd ise isi isp iss p-p paa pab pad pae pai pap pas pba pbb pbd pbe pbi pbp pbs pda pdb pdd pde pdi pdp pds pea peb ped pee pei pep pes pia pib pid pie pii pip pis ppa ppb ppd ppe ppi ppp pps ps- psa psb psd pse psi psp pss saa sab sad sae sai sap sas sba sbb sbd sbe sbi sbp sbs sda sdb sdd sde sdi sdp sds se- sea seb sed see sei sep ses sia sib sid sie sii sip sis spa spb spd spe spi spp sps ss- ssa ssb ssd sse ssi ssp sss