doo wop for hams.

Someone mentioned loving Morse Code? Have some fun with some of the old callsigns from my time in Greenland... DN4A, QM2A, DN4M . Then there's my favorite rhythm exercise, "Bens best bent wire".
You non-hams will never get the feel of those by looking them up and writing them down.

I didn't get far in my meager attempts to learn Morse but I think I'm getting your post.  Recognition of strings rather than individual symbols.