solved in java!

    if(N%2==0)
    {
        if  ((2<=N && N<=5)|| N>20)
    {
        System.out.println("Not Weird");
    }
    else if (6<=N && N<=20)
    {
        System.out.println("Weird");
    }
    }
    else
    {
        System.out.println("Weird");
    }