题目：姓名格式化输出-What's Your Name?
题目要求：
将输入的姓氏和名字格式化输出，输出文本格式为：
Hello firstname lastname! You just delved into python.
解题代码：
def print_full_name(first,last):
print(f'Hello {first} {last}! You just delved into python.')
if __name__ == '__main__':
first_name = input()
last_name = input()
print_full_name(first_name,last_name)