httpv://www.youtube.com/watch?v=cmhYW25YrmQ
Qui fait le malin…
httpv://www.youtube.com/watch?v=JoEiBy_KTZs
Really really really hard
httpv://www.youtube.com/watch?v=aSiWpfbnZg4
Boss & Listening
httpv://www.youtube.com/watch?v=HCxKb0xz7eQ
Conference call
httpv://www.youtube.com/watch?v=2W5s0jaLLbE