/* 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
	{
		// your code goes here
		List<String> list = commonChars(new String[]{"word"});
		for(String s : list){
		System.out.println(s);
		}
	}
    public static List<String> commonChars(String[] words) {
        int n = words.length;
        List<String> result = new ArrayList<>();
        String w = words[0];
        String[] parts = w.split("");
        for (int i = 0; i < parts.length; i++) {
            result.add(parts[i]);
        }
        return result;
    }
}

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