What is meant by "subscriptable"? Why the code gives the output as shown?

Question

l = [ 'ar' , [ 1 , 2 ]]

print ( l[0][0][0][0][0][0][0][0]) #output = 'a'
#but why
print(l[1][1][1]) # Doesn't Give 2?

#It gives TypeError: int object is not subscriptable.

Answer 1

l[0] = 'ar'
'ar'[0] = 'a'
'a'[0] = 'a'...