Its OK...In fact put LEVERED too...Since its 2...
Fifth letter is R
LEVERET -----> LEVERED No change ...therefore both D and T are wrong.
Second last E is wrong from TWELVES - 0
Now from SEVENTY -----> SEVERED only things that changed were NTY -------> RED and this led to +1 in the no. of correct letters...and since ED are wrong..R has to be correct
Next guess: GENERAL
P.S: Why the stress?