aaa aab aac aad aae aaf aag aah aai aaj 
aba abb abc abd abe abf abg abh abi abj 
aca acb acc acd ace acf acg ach aci acj 
ada adb adc add ade adf adg adh adi adj 
aea aeb aec aed aee aef aeg aeh aei aej 
afa afb afc afd afe aff afg afh afi afj 
aga agb agc agd age agf agg agh agi agj 
aha ahb ahc ahd ahe ahf ahg ahh ahi ahj 
aia aib aic aid aie aif aig aih aii aij 
aja ajb ajc ajd aje ajf ajg ajh aji ajj 
