I want to write a code if name present then only b

ls=“ninadbotalerushabsudhirnilunja”
age = int(input("Enter your Age : "))

if age>=18:
weg = int(input("Enter your Weight : "))
if weg>=50:
name:-input(‘Enter yor name’)
if n in ls:
print(‘blood donate’)
else:
print(‘under weight’)

else:
print(‘under age’)