import math

def is_prime(n):
    if n <= 1:
        return False
    if n <= 3:
        return True
    if n % 2 == 0 or n % 3 == 0:
        return False
    i = 5
    while i * i <= n:
        if n % i == 0 or n % (i + 2) == 0:
            return False
        i += 6
    return True

def can_starting_player_win(N):
    if N % 2 == 0:
        return True
    else:
        return not is_prime(N)

# Read input
N = int(input())

# Check if the starting player can win
if can_starting_player_win(N):
    print("Y")
else:
    print("N")