210327

'''
n = int(input())

print(-n)
'''
"""
n = input()

print(chr(n+1))
"""
'''
a, b = input().split()
a = int(a)
b = int(b)
print(a-b)
'''
'''
a,b = input().split("-")

print(a+b)
'''
'''
a,b,c = input().split(":")

print(b)
'''
'''
a = input()
b = input()

a = float(a)
b = float(b)

print(a+b)
'''