Get the first word from the clipboard

I am familiar with the substring command. It trims the clipboard to a certain number of characters. I don’t want to use the character count because they are variable. But, I don’t want to count the characters. I want just the first word of the clipboard (trimming away the rest). Here is an example of a typical clipboard:

John2015a Argument sturuture of Engish nouns

Now, I want to get just John2015a part only. The find and replace command also doesn’t seem suited for this.

Any way of doing this?

This should do the trick:

In case there are some non-word characters at the start of the string, you could use this, which matches with or without those chars:

<img src="/uploads/default/original/2X/7/7eeb5ab958ca70d45b365490d56da77600550cbf.png" width="479" height="229">

BTW, "[word characters](" are any of these (dash indicates a range):

Yes, this is what I have been looking for. Thank so much.