import java.util.*;
import java.util.regex.*;
import java.lang.*;
import java.io.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s = "Hello a l l you guys";
		String key = "all";
		String pat = "(?i)\\b" + String.join("\\W*", key.split("")) + "\\b";
		System.out.println("Pattern: " + pat);
		Matcher m = Pattern.compile(pat).matcher(s);
		if (m.find())
		{
			System.out.println("Found: " + m.group());
		}
	}
}

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