/* package whatever; // don't place package name! */
 
import java.util.*;
import java.util.regex.*;
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
	{
Pattern pattern = Pattern.compile("\\w(?=(\\w))");
Matcher matcher = pattern.matcher("abcde");
 
while (matcher.find())
{
    System.out.println(matcher.group(0)+matcher.group(1));
}
	}
}

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