a-a a-b a-i aaa aab aad aae aag aai aap ab- aba abb abd abe abg abi abp ad- ada adb add ade adg adi adp aea aeb aed aee aeg aei aep ag- aga agb agd age agg agi agp ai- aia aib aid aie aig aii aip ap- apa apb apd ape apg api app b-p baa bab bad bae bag bai bap bba bbb bbd bbe bbg bbi bbp bda bdb bdd bde bdg bdi bdp be- bea beb bed bee beg bei bep bga bgb bgd bge bgg bgi bgp bi- bia bib bid bie big bii bip bpa bpb bpd bpe bpg bpi bpp daa dab dad dae dag dai dap dba dbb dbd dbe dbg dbi dbp dda ddb ddd dde ddg ddi ddp de- dea deb ded dee deg dei dep dga dgd dge dgg dgi dgp di- dia dib did die dig dii dip dpa dpb dpd dpe dpg dpi dpp eaa eab ead eae eag eai eap eba ebb ebd ebe ebg ebi ebp ed- eda edb edd ede edg edi edp eea eeb eed eee eeg eep ega egb egd ege egg egi egp eia eib eid eie eig eii eip ep- epa epb epd epe epg epi epp g-d g-p gaa gab gad gae gag gai gap gba gbd gbe gbg gbi gbp gda gdb gdd gde gdi gdp ge- gea geb ged gee geg gei gep gga ggb ggd ggg ggi ggp gia gib gid gie gig gii gip gpa gpb gpd gpe gpg gpi gpp i-d ia- iaa iab iad iae iag iai iap iba ibb ibd ibe ibg ibi ibp ida idb idd ide idg idi idp ie- iea ied iee ieg iei iep iga igb igd ige igg igi igp iia iib iid iie iii iip ipa ipb ipd ipe ipg ipi ipp p-p paa pab pad pae pag pai pap pba pbb pbd pbe pbg pbi pbp pda pdb pdd pde pdg pdi pdp pea peb ped pee peg pei pep pga pgb pgd pge pgg pgi pgp pia pib pid pie pig pii pip ppa ppb ppd ppe ppg ppi ppp