I finally solved it, but can you?

UPDATE: I posted this in 2010, about a poster I got before Y2K and it is now 2022 and I am STILL getting e-mails for the solution. This may be one of my most popular blog posts! I think I need to update the photo with a better image! LOL If you need the solution, comment and I will email you the answer. I have had this framed poster hanging in my home or office for over TEN YEARS (I think much longer!) and have offered a cash reward for years to whoever was the first to “find the identical pen men” if only to solve it for me! I have starred at it and wasted much of my life wondering if it wasn’t a cruel joke. And then tonight, I SOLVED IT! I have used all kinds of systems. I have had post-it notes on it, going row by row. I have made photo copies and cut it up and tried sorting it. But I never finished any system. Then here, in my new house in Colorado, I hung it up in the restroom in the new Kidology office thinking there I might have more time to devote to…