kind: start
plm: 2.5 (20141031)
java: 1.8.0_25 (VM: Java HotSpot(TM) 64-Bit Server VM; version: 25.25-b02)
os: Mac OS X (version: 10.9.4; arch: x86_64)
kind: switched
switchto: welcome.lessons.welcome.variables.RunFour
lang: Python
exo: welcome.lessons.welcome.environment.Environment
outcome: pass