Title Encoder Python

Question

пишу любые решения(из инета) и постоянно ошибка. что не так?
нужно сделать For example, for the book title "Game of Thrones" the encoded version should be "GoT".
file = open("/usercode/files/books.txt", "r")

#your code goes here

file.close()

Answer 1

file = open("/usercode/files/books.txt", "r")
for line in file:
words = line.split()
i = ""
for word in words:
i += word[0]
print(i)

file.close()

Answer 2

t = "Game of Thrones"
for w in t.split(): print (w[0], end="")

Answer 3

file = open("/usercode/files/books.txt", "r")

#your code goes here
rl = file.readlines()
for r in rl:
for w in r.split(): print (w[0], end="")
print()

file.close()

https://www.sololearn.com/compiler-playground/c7XcuKuF2B6Y

Answer 4

file = open("/usercode/files/books.txt", "r")

#your code goes here
for x in file:
title=x.split()
for a in title:
print(a[0],end='')
print()

file.close()