我如何通过在空格处分割字符串来创建首字母缩略词，将字符索引为0，将其连接在一起并将其大写？

My code

我的代码

beginning = input("What would you like to acronymize? : ")

second = beginning.upper()

third = second.split()

fourth = "".join(third[0])

print(fourth)
beginning = input("What would