def es_primo(n):
    if n < 2:
        return False
    for i in range(2, int(n ** 0.5) + 1):
        if n % i == 0:
            return False
    return True
 
def filtrar_primos(lista):
    return [num for num in lista if es_primo(num)]
 
def main():
    try:
        # Leer la entrada y convertirla en lista de números
        entrada = input().strip()
        if not entrada:  # Si no hay entrada, usa una lista por defecto
            numeros = [2, 3, 4, 5, 10, 17, 19, 20, 23]
        else:
            numeros = list(map(int, entrada.split()))
 
        # Imprimir los números primos encontrados
        print("Números primos:", filtrar_primos(numeros))
 
    except Exception as e:
        print("Error:", e)
 
if __name__ == "__main__":
    main()
 

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