First I wanted to use * or <>, the first being a wildcard used in a lot of systems, and the second being used in places man pages. The first was printed too small in Slashdot font so it would be hard to see/read, the second was a pain to write out because I couldn't remember instantly how to type <. So I went with shell $ but it being late at night, my mind went more to sleep each second, and I forgot the exact syntax and anyway thought putting a $ at the end looked better. Overall I was dissatisfied with the choice and thought there was something better but was tired and gave up. That's probably why it's only modded +2 instead of +5 but now it's early morning and I'm going back to bed whytf am I writing Slashdot comments at $hour =~ m/0[1-6]:[0-6]\d/.