A friend of mine was typing a letter up in Notepad and called me saying that the letters were upside down. I’ve heard a few things in my time but never heard of upside down letters. So I went over and had a look. Everything looked fine, but she said no, the L’s are upside down. It still took a minute to figure out what she meant. But, yeah, a lower case L looks like an upside down upper case L.