5 (десятичная)

answ = 0
for a in range(1, 10):
    for b in range(10):
        for c in range(10):
            for d in range(10):
                x = a + b
                y = c + d
                if x < y:
                    if str(x) + str(y) == '117':
                        answ = max(answ, a * 1000 + b * 100 + c * 10 + d)
                else:
                    if str(y) + str(x) == '117':
                        answ = max(answ, a * 1000 + b * 100 + c * 10 + d)
print(answ)