#if-elif-else
'''
if 조건1:
    명령1
elif 조건2:
    명령2
else:
    명령 N
'''
score = 69.9999999999999999999999

if score >= 90:
    print('A')
elif score >= 80: 
    print('B')
elif score >= 70:
    print('C')
else:
    print('F')

print('----문제1----')
age = 12
if age < 8:
    print("유치원생")
elif age < 14:
    print("초등학생")
elif age < 17:
    print("중학생")
elif age < 20:
    print("고등학생")
else:
    print("기타")