PioneerCompetition: How many motors power Cronos Ecce-Robot 1?

Dear Users

Question: How many motors power the torso of the Cronos Humanoid Ecce-Robot 1 as described here: http://eccerobot.org ?

Reward: Among the correct solutions handed in, 2 copies of the English version and 2 copies of the Chinese version of the book "Body Intelligence": 

• Chinese: http://ailab.ifi.uzh.ch/research/a-new-view-of-intelligence-chinese
• English: http://ailab.ifi.uzh.ch/research/a-new-view-of-intelligence

are given away signed by Prof. Dr. Rolf Pfeifer (author), Prof. Dr. Weidong Chen and Prof. Dr. Wenwei Yu (translators). The winners will be announced during the book launch event at Swissnex Shanghai, China: http://shanghailectures.org/component/content/article/128

Good Luck!