/* 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
	{
		// your code goes here
		String line = "wall street 4 06:28 07:29 07:59 08:29 08:59 30 19:59 20:29 21:04 22:04 23:04 00:04 00:30";
		Pattern pattern = Pattern.compile("(?<=\\d\\s)\\d{2}(?=\\s\\d)");
 
    Matcher m = pattern.matcher(line);
    while (m.find()) {
        int value = Integer.parseInt(m.group().trim());
 
    }
    line = line.replaceAll("(?<=\\d\\s)\\d{2}(?=\\s\\d)", "").replaceAll(" +", " ");
		System.out.println(line);
	}
}

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