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@Greenbank
Near instantaneous (including looking for a 4-tuple that satisfies the requirements) but that's the benefit of not doing in something bonkers like ansible.
$ cat 1.inp | time ./1.pl 4
Answer: 968 1052 = 1018336
Answer: 846 530 644 = 288756720
Answer: 1193 339 339 149 = 20428012197
0.00user 0.00system 0:00.00elapsed 100%CPU (0avgtext+0avgdata 9376maxresident)k
0inputs+0outputs (0major+625minor)pagefaults 0swaps