. >> reporter: autocorrect turns it into minuphase. this year's bee has an added twist. contestants also had to define vocabulary words, a completely different skill. >> it would be almost as if you were having a sudoku competition and suddenly you told people they had to do multiplication tables to call pie. >> reporter: and isn't the spelling part hard enough already? >> backciforous. >> could i get everything, please? >> sure. >> reporter: backciforrous and autocorrect turns it into vaccine toys. >> none of those programs are foolproof. >> reporter: sometimes you just have to trust your gut. >> b-a-c-c-i-f-e-r-o-u-s? bacciferous? >> yes. >> reporter: for a moment like this. for "nightly business report," i'm jane wells. >> i would have spelled it as machine toy or whatever it was. vaccine toy. the finals are tonight and the winner gets $30,000 in cash, a $2,500 savings bond and a big reference library digital, of course. >> next they'll be wearing those glasses that will tell you how to spell the word. >>> that's "nightly business report" for tonight. thanks so much f