using System;
using System.IO;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var lines = new string[] { "Abc!@#111", "qwerty", "111", "@#$", "@#$1", " "};
foreach (string s in lines)
Console.WriteLine(Regex.IsMatch(s, @"^(?!\P{L}*$).{4,10}$"));
}
}
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