C#

<br />
string outputString = (12345).ToString("ABCDE-0000000000");<br />
//Output: "ABCDE0000000000"<br />

<br />
string outputString = (12345).ToString("ABCDED-0000000000");<br />
//Output: "ABCDED-0000012345"<br />

 string[] myString = ("ABCD-000066123884").Split('-');<br />
Int32.TryParse(myString[1],out intVar);

static int MyOwnParser(string text, string formatter)
{
  StringBuilder stringBuilder = new StringBuilder();
  for (int i = 0; i < formatter.Length; i++ )
  {
    if(formatter[i] == '0')
    {
      stringBuilder.Append(text[i]);
    }
  }

  return int.Parse(stringBuilder.ToString());
}

int result = 0;
for (int i = 0; i < formatter.Length; i++) {
   if (formatter[i] == '0') {
      result = result * 10 + (text[i] - '0');
   }
}

harold aptroot wrote:

the language in which there would be the lowest number of errors would be most likely