/* 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
{
{
Pattern p = Pattern.compile("(\\G(?!^)|^(?=(?:HH12|HH)+$))(?:HH12|HH)");
List<String> res = new ArrayList<>();
Matcher m = p.matcher(str);
while (m.find()) {
res.add(m.group());
}
}
}
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