Searching for text in a string

Hi All

Can anyone help, this one might be a bit of a challange...... i'm trying to find a formula that looks into a cell for certain text, so for instance in the example below there is a text range in cell B1 "OSNO NOTE OSTS NOPT INT" i want to search in this text range for the words "INT or EXT or INIT", then i want to display the text found in cell C, does anyone know if this is possible ?

Presentation1.jpg

Thanks

Jedski