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[] arrayOfLine = {"I.2 Other Interpretive Provisions" , "I.3 Accounting Terms","Including all","II.1 The Loans","II.3 Prepayments.","III.2 Illegality","IV.2 Conditions","V.2 Authorization","expected to have"};
		Pattern pat = Pattern.compile("^[A-Z]+\\.[0-9]+\\b");
		List<String> listOfHeadings = new ArrayList<>();
    	for (String s : arrayOfLine) {
    		Matcher m = pat.matcher(s);
    		if (m.find()) {
           		listOfHeadings.add(s);
    		}
		}
		System.out.println(listOfHeadings);
 
	}
}

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