Spelling is an arbitrary and capricious construct; if you know what they are saying get over it.
At the end, it was so touching it just brought tears to my eyes. This was filmed I am guessing in the 1980's. There was a young boy of about 8 in a wheelchair on the program. He explained his disability. He was 7 months old and had a tumor. When they went to get the tumor out, nerves were severed that told his arms and legs what to do.
The little guy was beautiful, and you could see how much he revered Mr. Rogers. Fred started to sing " It's You I Like", and the young boy smiled, and began singing along with Fred. I got all choked up, because he was teaching love to the audience, but he was making that young boy feel they were all alone. It was so good.
Hope those interested will check your local PBS and catch it. I am sure it will run over and over.