<b_jonas> slashlearn aoc//Advent of Code (AoC) is a series of programming puzzles that some regulars enjoy, found at "https://adventofcode.com/2019/about".

#!/bin/sh
if [ $# -ne 0 ]; then for f in "$@"; do echo "#!/bin/cat" && cat "$f"; done; else echo "#!/bin/cat" && cat; fi