Let's show them how it's done with primes + awk. Edit. They have a
gives us the list of all twin primes up to 100:
Tested on Ubuntu 22.10.
-d option which also shows gaps!!! Too strong:
sudo apt install bsdgames
primes -d 1 100 | awk '/\(2\)/{print $1 - 2, $1 }'0 2
3 5
5 7
11 13
17 19
29 31
41 43
59 61
71 73