25.09.10

# n = int(input())
# t=list(map(int,input().split()))
# small = min(t)
# m = max(t)
# print("%d"%(m-small))

# x,y = map(int,input().split('-'))
# y = y//1000000
# s = x//10000
# m=x%10000
# if y == 1 or y== 2 :
#     print("19%02d"%(s),end='/')
# else :
#     print("20%02d"%(s),end='/')
# k=m//100
# print("%02d"%(k),end='/')
# k = m%100
# print("%02d"%(k),end=' ')
# if y==1 or y==3 :
#     print("M")
# else :
#     print("F")