1. Description

Rate student's level based on exam score as following rules

• Over 90：A
• 75~90：B
• 60~75：C
• Below 60：F

2. Input & Output

Input:

• Use input() as input. Notice that the value you get from input() is a string
• Refering code below to load multiple inputs

s = input().split(" ")

# 读取第一个输入，如果想要读入整数，就通过 int() 把它变成整数
input_1 = int(s[0])

# 读取第二个输入，不需要数字时，就保留字符串
input_2 = s[1]

Output:

• Use print() for your output

Example

# Input: 
93
# Output: 
A

# Input: 
74
# Output: 
C