using System;

public class Program

{

    public static void Main()

    {

        string[] fields = {"one", "two", "three"};

        string[] cmp_fields = {"one", "not_two", "three"};

        for(int i=0; i < fields.Length; ++i) {

            if (fields[i] != cmp_fields[i])

                Console.WriteLine("mismatch in {0} field", i);  

        }

    }

}