import machine
from machine import Pin

#ENTRADA
S1_in = Pin(19, Pin.IN, Pin.PULL_UP)
S2_in = Pin(18, Pin.IN, Pin.PULL_UP)

#SALIDA
led_A = Pin(14, Pin.OUT)
led_B = Pin(27, Pin.OUT)
led_C = Pin(26, Pin.OUT)
led_D = Pin(25, Pin.OUT)

while True:
    S1 = S1_in.value()
    S2 = S2_in.value()

    A = (not S1 and not S2)
    B = (not S1 and S2)
    C = (S1 and not S2)
    D = (S1 and S2)

    led_A.value(A)
    led_B.value(B)
    led_C.value(C)
    led_D.value(D)