'''
bmi=int(input())
if bmi <= 10:
print("정상")
elif bmi <= 20:
print("과체중")
else:
print("비만")
'''
'''
score=int(input())
if score >= 90:
print("A")
elif score >= 80:
print("B")
elif score >= 70:
print("C")
elif score >= 60:
print("D")
else:
print("F")
'''
'''
n=int(input())
if n % 10==1 and n // 10 != 1 :
print(n,end='st')
elif n % 10 == 2 and n // 10 !=1 :
print(n,end='nd')
elif n % 10 == 3 and n // 10 !=1 :
print(n,end='rd')
else :
print(n,end='th')
'''
'''
easy 1201 1224 1216 1230
'''
'''
a=int(input())
if a>0:
print("양수")
elif a<0:
print("음수")
else:
print("0")
'''