a-a a-b a-i aaa aab aad aae aag aai aan aas ab- aba abb abd abe abg abi abn abs ad- ada adb add ade adg adi adn ads aea aeb aed aee aeg aei aen aes ag- aga agb agd age agg agi agn ags ai- aia aib aid aie aig aii ain ais an- ana anb and ane ang ani ann ans as- asa asb asd ase asg asi asn ass baa bab bad bae bag bai ban bas bba bbb bbd bbe bbg bbi bbn bbs bda bdb bdd bde bdg bdi bds be- bea beb bed bee beg bei ben bes bga bgb bgd bge bgg bgi bgn bgs bi- bia bib bid bie big bii bin bis bna bnb bnd bne bng bni bnn bns bsa bsb bsd bse bsg bsi bsn bss daa dab dad dae dag dai dan das dba dbb dbd dbe dbg dbi dbn dbs dda ddb ddd dde ddg ddi ddn dds de- dea deb ded dee deg dei den des dga dgd dge dgg dgi dgn dgs di- dia dib did die dig dii din dis dna dnb dnd dne dng dni dnn dns dsa dsb dsd dse dsg dsi dsn dss eaa eab ead eae eag eai ean eas eba ebb ebd ebe ebg ebi ebn ebs ed- eda edb edd ede edg edi edn eds eea eeb eed eee eeg een ees ega egb egd ege egg egi egn egs eia eib eid eie eig eii ein eis en- ena enb end ene eng eni enn ens es- esa esb esd ese esg esi esn ess g-d gaa gab gad gae gag gai gan gas gba gbd gbe gbg gbi gbn gbs gda gdb gdd gde gdi gdn gds ge- gea geb ged gee geg gei gen ges gga ggb ggd ggg ggi ggn ggs gia gib gid gie gig gii gin gis gna gnb gnd gne gni gnn gns gsa gsb gsd gse gsg gsi gsn gss i-d ia- iaa iab iad iae iag iai ian ias iba ibb ibd ibe ibg ibi ibn ibs ida idb idd ide idg idi idn ids ie- iea ied iee ieg iei ien ies iga igb igd ige igg igi ign igs iia iib iid iie iii iin iis in- ina inb ind ine ing ini inn ins is- isa isb isd ise isg isi isn iss n-i naa nab nad nae nag nai nan nas nba nbb nbd nbe nbg nbi nbn nbs nda ndb ndd nde ndg ndi ndn nds ne- nea neb ned nee neg nei nen nes nga ngb ngd nge ngg ngi ngn ngs nia nib nid nie nig nii nin nis nna nnb nne nng nni nnn nns nsa nsb nsd nse nsg nsi nsn nss saa sab sad sae sag sai san sas sba sbb sbd sbe sbg sbi sbn sbs sda sdb sdd sde sdg sdi sdn sds se- sea seb sed see seg sei sen ses sga sgb sgd sge sgg sgi sgn sgs sia sib sid sie sig sii sin sis sna snb snd sne sng sni snn sns ss- ssa ssb ssd sse ssg ssi ssn sss