a-a a-b aaa aab aae aag aaw ab- aba abb abe abg abw aea aeb aee aeg aew ag- aga agb age agg agw aw- awa awb awe awg aww baa bab bae bag baw bba bbb bbe bbg bbw be- bea beb bee beg bew bga bgb bge bgg bgw bwa bwb bwg eaa eab eae eag eaw eba ebb ebe ebg ebw eea eeb eee eeg eew ega egb ege egg egw ewa ewb ewe eww gaa gab gae gag gaw gba gbe gbg gbw ge- gea geb gee geg gew gga ggb ggg ggw gwa gwb gwe gwg waa wab wae wag waw wba wbb wbe wbg wbw wea web wee weg wew wga wgb wgw wwa wwe www