using System;
using System.Linq;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var s = "One thing is not the other one, even if it is one";
var res = Regex.Matches(s, @"\b\w+\b").OfType<Match>().Select(m => m.Value).Distinct();
Console.WriteLine(String.Join(" ", res));
}
}
dXNpbmcgU3lzdGVtOwp1c2luZyBTeXN0ZW0uTGlucTsKdXNpbmcgU3lzdGVtLlRleHQuUmVndWxhckV4cHJlc3Npb25zOwoKcHVibGljIGNsYXNzIFRlc3QKewogIHB1YmxpYyBzdGF0aWMgdm9pZCBNYWluKCkKICB7CiAgICB2YXIgcyA9ICJPbmUgdGhpbmcgaXMgbm90IHRoZSBvdGhlciBvbmUsIGV2ZW4gaWYgaXQgaXMgb25lIjsKICAgIHZhciByZXMgPSBSZWdleC5NYXRjaGVzKHMsIEAiXGJcdytcYiIpLk9mVHlwZTxNYXRjaD4oKS5TZWxlY3QobSA9PiBtLlZhbHVlKS5EaXN0aW5jdCgpOwogICAgQ29uc29sZS5Xcml0ZUxpbmUoU3RyaW5nLkpvaW4oIiAiLCByZXMpKTsKICB9Cn0=