def f(n): return 420 / n
a = f(2) + f(3) + f(5) + f(7)
b = f(2*3) + f(2*5) + f(2*7) + f(3*5) + f(3*7) + f(5*7)
c = f(2*3*5) + f(2*3*7) + f(2*5*7) + f(3*5*7)
d = f(2*3*5*7)
x = a - b + c - d
X = 420 - x
print("a =",a)
print("b =",b)
print("c =",c)
print("d =",d)
print("x =",x)
print("X =",X)
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