/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
//import java.util.regex.*;
import java.util.regex.Matcher; 
import java.util.regex.Pattern;
 
/* 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
	{
		Scanner myObj = new Scanner(System.in);  // Create a Scanner object
 
		//stackoverflow/questions/2296685/how-to-read-input-with-multiple-lines-in-java
		//stackoverflow/questions/56887493/how-to-take-multi-line-input-in-java search:HashmatWarrior
		while(myObj.hasNext()) // see if there's more
		{
			String schedule = myObj.nextLine();  // Read user input (from w3schools/java/java_user_input.asp)
 
			//stackoverflow/questions/10004066/java-splitting-an-input-file-by-colons
			String schedParts[] = schedule.split("\t");
			String workDay=schedParts[0];
 
			if(schedParts.length>1)
			{
				String workDate=schedParts[1];
				System.out.print(workDay+" "+workDate+", ");
 
				if(schedParts.length>2)
				{
					String workTime=schedParts[2];
					String workLength=schedParts[3];
 
					//w3 schools
					String matchMe="(pm)|( O)|( )";
					Pattern pattern = Pattern.compile(matchMe);
					Matcher matcher = pattern.matcher(workTime);
					workTime = matcher.replaceAll("");
					boolean matchFound = matcher.find();
					System.out.print(workTime+", ");
				}
				System.out.println();
			}
 
		else if(schedParts.length==1)
			{
				System.out.println();
			}
		}
	}
}

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Sun	7/27	5:30pm - 10:30pm O	0:00
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Tue	7/29	5:30pm - 10:30pm O	0:00
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