merge sort pl

⢳⣿⣶⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠈⠻⢿⣿⣯⣵⣤⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣴⣾⣿⣿⣏⡁⡱⣦⡀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠙⠛⠿⢿⣿⠊⠐⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣟⣻⣿⣾⣿⣷⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠙⣿⣦⣤⣷⣷⣄⡀⠀⠀⠀⠀⠀⠀⠀⠘⣿⣿⣿⣿⣿⡿⢿⣾⣿⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠈⢿⣿⣿⣿⣵⣻⣆⠀⠀⠀⠀⠀⠀⠀⠘⣿⣿⣮⣝⠀⣈⣝⠁⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠻⣿⣿⣿⣿⣯⣕⣤⡀⠀⠀⠀⠀⠀⢻⣿⡯⠒⠀⣠⠙⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⢿⣿⣿⣿⣿⣞⣵⡀⠀⠀⠀⠀⠘⣝⣷⣿⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⣿⣿⣿⣿⣿⣿⣽⢲⠶⣢⣴⣿⣧⣾⠆⠀⡣⡀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⣿⣿⣿⣷⣿⣸⣺⣶⠿⣿⠉⡛⠽⣥⣰⠁⠈⡅⢐⠠⢄⡀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⣿⡿⢞⣾⣿⣿⣿⣬⡿⣾⣕⡽⣃⣤⣄⡛⠈⠀⣰⣛⡀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠙⢾⣿⣿⣿⣿⢿⡅⡈⢾⣿⣟⠂⠈⢷⢤⣀⣷⣋⠇