/* 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 Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		List<String> last = new ArrayList<>();
		last.add("a");
		last.add("b");
		last.add("c");
		for(String i : last){
			System.out.println(i);
			last.remove(i);
		}
		System.out.println(last);
	}
}

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