/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class A
{
    public static void main(String[] args) {
        B.f();
    }
}
 
interface B {
    static void f() {
        C.f();
    }
}
 
interface C {
    static void f() {
        StackTraceElement[] stackTrace1 = (new Exception()).getStackTrace();
        StackTraceElement[] stackTrace2 = Thread.currentThread().getStackTrace();
        for (StackTraceElement e : stackTrace1)
            System.out.println(e);
        System.out.println();
        for (StackTraceElement e : stackTrace2)
            System.out.println(e);
    }
}
 

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