What is wrong with my No numerals!

Question

I passed all case, without case 3. Can someone help me ?
class Program
{
static void Main(string[] args)
{
string s = Console.ReadLine();
Console.WriteLine(Kajman.NoNumerals(s));
}
}
public class Kajman
{
public static string NoNumerals(string str)
{
Kajman k = new Kajman();
str= k.Ten(str);

return str.Replace("0", "zero").Replace("2", "two").Replace("3", "three").Replace("4", "four").Replace("5", "five").Replace("6", "six")
.Replace("7", "seven").Replace("8", "eight").Replace("9", "nine").Replace("1", "one");
}
public string Ten(string str)
{
string x = "";
for (int i = 0; i < str.Length; i++)
{
if (str[i] == '1')
{
if (str[++i] == '0')
{
x= str.Replace("10", "ten");
}
}else
x=str;
}
return x;
}
}

Answer 1

You don't need string ten().
You just need to add Replace("10", "ten") at the return first. So the method will first find "10" and won't find "1". Just make it first and it will be good

Answer 2

Solved thx ! 😀