Question 122
Find the distinct positive integers $a$, $b$, $c$, $d$, such that the following conditions hold:
(1) exactly three of the four numbers are prime numbers;
(2) $a^2 + b^2 + c^2 + d^2 = 2018$.
(1) exactly three of the four numbers are prime numbers;
(2) $a^2 + b^2 + c^2 + d^2 = 2018$.