a-a a-b a-z aaa aab aad aae aag aaz ab- aba abb abd abe abg abz ad- ada adb add ade adg adz aea aeb aed aee aeg aez ag- aga agb agd age agg agz az- aza azb azd aze azg azz baa bab bad bae bag baz bba bbb bbd bbe bbg bda bdb bdd bde bdg bdz be- bea beb bed bee beg bez bga bgb bgd bge bgg bgz bza bzd bze bzz daa dab dad dae dag daz dba dbb dbd dbe dbg dbz dda ddb ddd dde ddg ddz de- dea deb ded dee deg dez dga dgd dge dgg dgz dza dzb dzd dze eaa eab ead eae eag eaz eba ebb ebd ebe ebg ed- eda edb edd ede edg eea eeb eed eee eeg ega egb egd ege egg eze ezz g-d gaa gab gad gae gag gaz gba gbd gbe gbg gbz gda gdb gdd gde ge- gea geb ged gee geg gez gga ggb ggd ggg ggz gza z-g zaa zab zad zag zaz zbb zea zeb zed zee zez zgb zgg zzz