# Which answer is correct?
# a. All of the below
# b. None of the below
# c. All of the above
# d. One of the above
# e. None of the above
# f. None of the above

from z3 import *

a = Bool('a')
b = Bool('b')
c = Bool('c')
d = Bool('d')
e = Bool('e')
f = Bool('f')

ans_a = a == And(b,c,d,e,f)
ans_b = b == And(Not(c), Not(d), Not(e), Not(f))
ans_c = c == And(a,b)
ans_d = d == Or(And(a,Not(b),Not(c)), And(Not(a),b,Not(c)), And(Not(a),Not(b),c))
ans_e = e == And(Not(a),Not(b),Not(c),Not(d))
ans_f = f == And(Not(a),Not(b),Not(c),Not(d), Not(e))

constraints = [ans_a, ans_b, ans_c, ans_d, ans_e, ans_f]

s = Solver()
s.add(constraints)