What was the p-value of the ADF test after applying both Box-Cox transformation and second-order differencing?

What was the p-value of the ADF test after applying both Box-Cox transformation and second-order differencing?: a task in SmolDataEnvs-harbor-train-sandbox: 📊 SmolDataEnvs: Harbor (train) (Harbor dataset). Files (in /home/user/input, no subfolders): - AirPassengers.csv