import java.util.regex.*;
import java.util.*;
import java.lang.*;
import java.io.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s = "qweSSXFF rrrrrFfF7f syyyyyearssssssyear";
		String regex = "(?i)RR|SYYYY|SSSSS|ff\\d|ff(?=\\D)|SSXFF|E|YEAR|SYEAR";
		String[] res = splitIncludingDelimiters(regex, s);
		System.out.println(Arrays.toString(res));
	}
	public static String[] splitIncludingDelimiters(String regex, String text) {
	    List<String> list = new LinkedList<>();
	    Matcher matcher = Pattern.compile(regex).matcher(text);
 
	    StringBuffer sbuf = new StringBuffer();
	    while(matcher.find()){
	        matcher.appendReplacement(sbuf, matcher.group());
	        list.add(sbuf.toString());
	        sbuf.setLength(0);
	    }
 
	    matcher.appendTail(sbuf);
	    if (sbuf.length() > 0) list.add(sbuf.toString());
 
	    return list.toArray(new String[list.size()]);
	}
}

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