-ic a-a a-b a-c a-i aaa aab aac aad aae aag aai aan ab- aba abb abc abd abe abg abi abn ac- aca acb acc acd ace acg aci acn ad- ada adb adc add ade adg adi adn aea aeb aec aed aee aeg aei aen ag- aga agb agc agd age agg agi agn ai- aia aib aic aid aie aig aii ain an- ana anb anc and ane ang ani ann baa bab bac bad bae bag bai ban bba bbb bbc bbd bbe bbg bbi bbn bca bcb bcc bcd bce bcg bci bcn bda bdb bdc bdd bde bdg bdi be- bea beb bec bed bee beg bei ben bga bgb bgc bgd bge bgg bgi bgn bi- bia bib bic bid bie big bii bin bna bnb bnc bnd bne bng bni bnn c-- caa cab cac cad cae cag cai can cba cbb cbc cbd cbe cbg cbi cbn cca ccb ccc ccd cce ccg cci ccn cda cdb cdc cdd cde cdg cdi cdn ce- cea ceb cec ced cee ceg cei cen cga cgb cgc cgd cge cgg cgi cgn ci- cia cib cic cid cie cig cii cin cn- cna cnb cnc cnd cne cng cni cnn daa dab dac dad dae dag dai dan dba dbb dbc dbd dbe dbg dbi dbn dca dcb dcc dcd dce dcg dci dcn dda ddb ddc ddd dde ddg ddi ddn de- dea deb dec ded dee deg dei den dga dgc dgd dge dgg dgi dgn di- dia dib dic did die dig dii din dna dnb dnc dnd dne dng dni dnn eaa eab eac ead eae eag eai ean eba ebb ebc ebd ebe ebg ebi ebn ec- eca ecb ecc ecd ece ecg eci ecn ed- eda edb edc edd ede edg edi edn eea eeb eec eed eee eeg een ega egb egc egd ege egg egi egn eia eib eic eid eie eig eii ein en- ena enb enc end ene eng eni enn g-d gaa gab gac gad gae gag gai gan gba gbc gbd gbe gbg gbi gbn gca gcb gcc gcd gce gcg gci gcn gda gdb gdc gdd gde gdi gdn ge- gea geb gec ged gee geg gei gen gga ggb ggc ggd ggg ggi ggn gia gib gic gid gie gig gii gin gna gnb gnc gnd gne gni gnn i-d ia- iaa iab iac iad iae iag iai ian iba ibb ibc ibd ibe ibg ibi ibn ica icb icc icd ice icg ici icn ida idb idc idd ide idg idi idn ie- iea iec ied iee ieg iei ien iga igb igc igd ige igg igi ign iia iib iic iid iie iii iin in- ina inb inc ind ine ing ini inn n-i naa nab nac nad nae nag nai nan nba nbb nbc nbd nbe nbg nbi nbn nca ncb ncc ncd nce ncg nci ncn nda ndb ndc ndd nde ndg ndi ndn ne- nea neb nec ned nee neg nei nen nga ngb ngc ngd nge ngg ngi ngn nia nib nic nid nie nig nii nin nna nnb nnc nne nng nni nnn