using System;
using System.Collections.Generic;
using System.Globalization;
using System.Text;
using System.Text.RegularExpressions;
using System.Reflection;
public class MainClass{
public static void Main(){
Regex r1 = new Regex(@"<([^>]+)>[^<]*</(\1)>");
string s0 = "<M>S</M>";
string s1 = "<M>S</I>";
Console.WriteLine(r1.IsMatch(s0));
Console.WriteLine(r1.IsMatch(s1));
}
}
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