Python, Concurrency, Parallelism, Multiprocessing, Asynchronous.
Payment #After the payments are done, the others have started. Mail: Mon Sep 26 18:38:44 2022 3 Confirmation: Mon Sep 26 18:38:44 2022 10 Mail: Mon Sep 26 18:38:45 2022 2 Confirmation: Mon Sep 26 18:38:45 2022 9 Mail: Mon Sep 26 18:38:46 2022 1 Exit: Mail Confirmation: Mon Sep 26 18:38:46 2022 8