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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