getbase = input()
if getbase == 'b' or 'a' or 'c' or 'd':
if getbase == 'b' or 'a':
getnum = 2
elif getbase == 'c' or 'd':
getnum = 4
else:
getnum = 8
print(getnum)
based on this code it always return 2
I know I have to change the if blocks but still I am wondering why this happen in this case