Ambiguous Field: What will be the output of below Java code?

interface Intra 
{
    int x = 39;
}

interface  D  
{
    int x = 10;
}

public class C implements Intra, D 
{
    public static void main(String[] args) 
    {
        System.out.println(Intra.x); //line:1
        System.out.println(D.x); //line:2	
    }
}

public class F implements Intra, D
{
    public static void main(String[] args) 
    {
	    System.out.println(x); //line:3	
    }
}

Output:

at line 1 :- 39

at line 2:- 10

at Line 3:- The field x is ambiguous