Reduce a while-loop condition – python

I’m trying to create a constraint so that the "lettera" input variable is a letter of the alphabet between a and h on this code *1 but I think there’s a better way to write the condition for the loop.

Thanks if someone could help me figuring out how re-write it smaller.

*1

while (lettera != 'a' and lettera != 'b' and lettera != 'c' and lettera != 'd' and lettera != 'e' and lettera != 'f' and lettera != 'g' and lettera != 'h'):
    lettera= input('Inserisci un valore lettera a-h ')

>Solution :

while lettera not in 'abcdefgh':