using System;
using System.Collections.Generic;
using System.Linq;
 
namespace MaxDigitInString
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = "১१৴௧౧";
            List<int> lst = new List<int>();
 
            foreach ( char c in s )
            {
                if (char.IsDigit(c)) lst.Add(c - '0');
            }
 
            Console.WriteLine( "Maximum is {0}", lst.Max() );
        }
    }
}

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