a = 1
b = 3
z = 5
def count_x(a, b):
    x = a + b
    return x
def count_y(x, z):
    y = x + z
    return y
count_x(a, b)
count_y(x, z)

 a = 1
b = 3
z = 5
 
def count_x(a, b):
    x = a + b
    return x
 
def count_y(x, z):
    y = x + z
    return y
 
x = count_x(a, b)          #результат выполнения функции надо передать в переменную "x"
result = count_y(x, z)
 
print(result)