import os as life
from os import listdir as everything

brain = []

def from_beginning():
    return life.path.abspath(life.sep)

try:
    for knowledge in everything(from_beginning()):
        brain.append(knowledge)
except:
    print("Once you stop learning, you start dying!")

for my, learnings in enumerate(brain):
    print("[{:}] {:}".format(my, learnings))