import static java.lang.System.in;

class Prime{
    void checkPrime(int ...input){
        int flag=0;
        for (int num : input){
            if(isPrime(num))
                System.out.print(num+" ");
            flag++;
        }
        if(flag<4)
            System.out.println();
    }
    private boolean isPrime(int num){
        BigInteger bi;
        bi = BigInteger.valueOf(num);
        return bi.isProbablePrime(1);
    }
}