using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Numerics;


namespace Atcoder01
{
    /*class Program
    {
        //ABC96B
        static void Main()
        {
            int[] input = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int N = int.Parse(Console.ReadLine());
            Array.Sort(input);
            int Ans = input[0] + input[1];
            var ans = input.Max();
            for (int i = 0; i < N; i++)
            {
                ans = ans * 2;
            }
            Console.WriteLine(ans + Ans);
        }
    }*/
    //ABC94B
    /*class Program
    {
        static void Main()
        {
            int[] input = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int[] gate = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int N = input[0];
            int M = input[1];
            int X = input[2];
            int cost1 = 0;
            int cost2 = 0;
            for (int i = 0;i<X;i++)
            {
                if (gate.Contains(i))
                {
                    cost1++;
                }
            }
            for (int i = X;i<= N+1;i++)
            {
                if (gate.Contains(i))
                {
                    cost2++;
                }
            }
            List<int> Answer = new List<int>();
            Answer.Add(cost1);
            Answer.Add(cost2);
            Console.WriteLine(Answer.Min());
        }
    }*/
    //ABC93B
    class Program
    {
        /*static void Main()
        {
            int[] input = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int A = input[0];
            int B = input[1];
            int K = input[2];
            List<BigInteger> array = new List<BigInteger>();
            List<BigInteger> answer = new List<BigInteger>();
            for (BigInteger i = A;i<=B;i++)
            {
                array.Add(i);
            }
            for(BigInteger i =A;i<A+K;i++)
            {
                answer.Add(i);
            }
            for (BigInteger i = B; i > B-K;i--)
            {
                answer.Add(i);
            }
            answer.Sort();
            IEnumerable<BigInteger> result = answer.Distinct();
            foreach (BigInteger aa in result)
            {
                if (array.Contains(aa)) {
                    Console.WriteLine(aa);
                }
            }
        }*/
        static void Main()
        {
            int[] input = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int A = input[0];
            int B = input[1];
            int K = input[2];
            List<int> ans1 = new List<int>();
            for (int i=A;i<A+K;i++)
            {
                ans1.Add(i);
            }
            for (int i =B-K+1;i<=B;i++)
            {
                ans1.Add(i);
            }
            ans1.Sort();
            IEnumerable<int> result = ans1.Distinct();
            foreach (BigInteger aa in result)
            {
                if (A<=aa && aa<=B) {
                    Console.WriteLine(aa);
                }
            }
        }
    }
    //ABC92B
}


Measured memory_bytes: 13780