using System;
using System.Collections.Generic;
using System.Linq;

    public class WeightSort
    {
        public static string orderWeight(string strng)
        {
            var weights = strng.Split(' ')
                .OrderBy(num => num.Sum(x => (int)char.GetNumericValue(x)))
                .ThenBy(num => num);

            return String.Join(" ", weights);
        }
    }