alert suppression logic in sh

Write a Bourne Shell function which accepts a line of specialized text and returns success if that particular line passes the filter, or non-success if it does NOT pass the filter. The filtering logic described in attachment. ## Deliverables Coders that apply should attach a sample shell script written by them within the last 2 years, as an example of similar work. We would prefer Bourne shell code but if that is not available, any Unix scripting language will do. The script does not need to follow our guidelines given in current specs." (Note that although a small task, this is part of a large project and we are preferring people who are long-term oriented.)