a-a a-b aaa aab aae aag aaj aan ab- aba abb abe abg abj abn aea aeb aee aeg aej aen ag- aga agb age agg agj agn aja ajb aje ajj ajn an- ana anb ane ang anj ann baa bab bae bag baj ban bba bbb bbe bbg bbn be- bea beb bee beg ben bga bgb bge bgg bgn bja bjg bjj bjn bna bnb bne bng bnj bnn eaa eab eae eag eaj ean eba ebb ebe ebg ebj ebn eea eeb eee eeg een ega egb ege egg egn eja en- ena enb ene eng enn gaa gab gae gag gaj gan gba gbe gbg gbj gbn ge- gea geb gee geg gen gga ggb ggg ggj ggn gja gje gjg gna gnb gne gnn jaa jab jae jag jaj jan jba jbg jbj jea jeb jee jeg jej jen jga jgb jge jgn jja jjb jjg jjj jna jne jng jnj jnn naa nab nae nag naj nan nba nbb nbe nbg nbn ne- nea neb nee neg nej nen nga ngb nge ngg ngj ngn nja nje njn nna nnb nne nng nnn