Wrong conditions

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From: https://py.checkio.org/mission/color-map/solve/

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Hi! I have a wrong condition in the mission. color_map(((0,0,0,0,0,0,0,0,0,0,),(0,1,1,1,1,1,1,1,1,0,),(0,1,0,0,0,0,0,0,1,0,),(0,1,0,6,0,8,10,0,1,0,),(0,1,0,5,0,7,9,0,1,0,),(0,1,0,0,4,0,0,0,1,0,),(0,1,0,3,0,2,2,0,1,0,),(0,1,0,3,0,2,11,0,1,0,),(0,1,0,0,0,0,0,0,1,0,),(0,1,1,1,1,1,1,0,1,0,),(0,0,0,0,0,0,0,0,0,0,),))

The length of the region is 11. But in mission description precondition is 0 < len(region) ≤ 10 And I can't find decision by myself. My attempt in the attachment.