# x,y = map(int,input().split())
# data = list(map(int, input().split()))
#
# v = sum(data[:y])
# maximum = v
#
# for i in range(x-y):
# v = v - data[i] + data[i + y]
# maximum = max(v, maximum)
#
# print(maximum)
# y = int(input())
# y = y % 60
# i = y % 10 #십간
# j = y % 12 #십이지
# a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
# b = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L']