/* package whatever; // don't place package name! */
 
import java.util.*;
import java.util.stream.*;
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> strList = new ArrayList<>(Arrays.asList("one", "two", "three", "four", "five"));
 
    List<String> joined = 
        IntStream.range(0, (1 + strList.size()) / 2)
            .mapToObj(i ->
                (2*i + 1) < strList.size()
                    ? "(" + strList.get(2*i) + " " + strList.get(2*i + 1) + ")"
                    : strList.get(2*i))
            .collect(Collectors.toList());
 
		System.out.println(joined);
	}
}

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