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# Write your entire commit message above this line.
# 
# The first line should be a quick description of what you changed.
# Then leave a blank line. 
# Then, taking as many lines as you want, answer the questions for 
# your current checkpoint: 
#
# Checkpoint 1: You are starting to work with more complex data structures.
# Reflect on one place you got stuck--because you weren't sure
# what you needed the program to do, because you weren't sure how to 
# use the new syntax, or for another reason. What strategies did you use
# to get un-stuck?
#
# Checkpoint 2: Sections 2.1, 2.2, and 2.3 talk about computer systems 
# at three different scales: functions (within a Python program), 
# programs (running in Terminal), and distributed services (running
# across the Internet). Explain what these systems have in common.