/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* 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
	{
		String str = " <play> a < b  <play> at < button >\n <play> a < 90 <play> at < button >";
    	System.out.println(str.replaceAll("(\\w+)\\s*<\\s*(\\w++(?!\\s*>))", "$1 less than $2"));
	}
}

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