import machine
from machine import Pin

ledRosa = Pin(1, Pin.OUT)
E1=Pin(4, Pin.IN, Pin.PULL_UP)
E2=Pin(5, Pin.IN, Pin.PULL_UP)
E3=Pin(6, Pin.IN, Pin.PULL_UP)

while True:
    A= E1.value()
    B= E2.value()
    C= E3.value()

    producto = (A and B and C)
    ledRosa.value(producto)