extracting a substring from a huge string

I have a huge string. I need to extract a substring from that that huge string. The conditions are the string starts with either "TECHNICAL" or "JUSTIFY" and ends with a number, any number from 1 to 10. so for example, i have

string x = "This is a test, again I am test TECHNICAL: I need to extract this substring starting with testing. 8. This is test again and again开发者_JS百科 and again and again";

so I need this

TECHNICAL: I need to extract this substring starting with testing.

I was wondering if someone has elegant solution for that.

Thanks in advance.

You can use Regular Expression for that.
Example:

string input = "This is a test, again I am test TECHNICAL: I need to extract this substring starting with testing. 8. This is test again and again and again and again";
string pattern = @"(TECHNICAL|JUSTIFY).*?(10|[1-9])";

System.Text.RegularExpressions.Regex myTextRegex = new Regex(pattern);

Match match = myTextRegex.Match(input );
string matched = null;
if (match.Groups.Count > 0)
{
   matched = match.Groups[0].Value;
}

//Result: matched = TECHNICAL: I need to extract this substring starting with testing. 8