题解 | #格式化输出（二）#

name = input("")
# lower() 转为全小写
name = name.lower()

print(name)
# upper() 转为全大写
name = name.upper()
print(name)

# capitalize() 仅仅首字母大写 
# title() 将每个单词的首字母大写
name = name.title()
print(name)