import javax.swing.*;

class ExtractWord
{
    private static final char BLANK = ' ';

    public static void main(String[] args)
    {
        
        String myStr, word;
        int len, index, startIndex, endIndex;
        
        myStr = JOptionPane.showInputDialog(null,"Enter a list of words separated by spaces");
        
        len = myStr.length();
        index = 0;
        
        while (index < len) {

           // skip over spaces

             while ((index<len)&&(myStr.charAt(index) == BLANK)) index++;

           // mark startpoint

             startIndex = index;
           
           // find endpoint

             while ((index<len)&&(myStr.charAt(index) != BLANK)) index ++;

             endIndex = index;

           // extract word

             if (startIndex != endIndex) 
                {
                   word = myStr.substring(startIndex,endIndex);
                   System.out.println(word);
                } 
            }
       System.exit(0);

    }
}