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java solution
import java.io.*; import java.util.*; import java.util.regex.Pattern; import java.util.regex.Matcher; public class Solution { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); Pattern pattern = Pattern.compile("^hi (?!d).*", Pattern.CASE_INSENSITIVE); int n = Integer.parseInt(scanner.nextLine()); for (int i = 0; i < n; i++) { Matcher matcher = pattern.matcher(scanner.nextLine()); if (matcher.matches()) System.out.println(matcher.group(0)); } } }
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Saying Hi
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java solution