When will I see my friend? My friend and I both sing in the choir of our local episcopal church, but our choir director is really strict. He doesn't like people talking much. At our last rehearsal, right at the end of a break, I asked my friend if she wanted to come over to my house sometime this week. But before she could answer, the director ended the break and restarted our rehearsal.
However, a minute later, my friend ripped a scrap of paper and scribbled something on it. She tucked the paper inside my hymnal, which was lying on the bench, and poked me in the side.
When I pulled the paper out later, I smiled. I knew exactly when I would see her next. The paper looked like this:

WLP.756.R.7.1 427.2.10.3 256.2.3.2 494.4.3.1 GC.689.4.2.4 8.1.1.1

When will I see my friend?
(The story is fictional, but the details matter. I made this up myself, so I’m not sure if it’s too hard though.)

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