(:MEAN-INTENSITY 0.5 :TEST-CONTRAST 0.1)
(:MEAN-INTENSITY 0.5 :TEST-CONTRAST 0.1)
(:MEAN-INTENSITY 0.5 :TEST-CONTRAST 0.1)
(:MEAN-INTENSITY 0.5 :TEST-CONTRAST 0.1)

(:MEAN-INTENSITY 0.5 :TEST-CONTRAST 0.2)
(:MEAN-INTENSITY 0.5 :TEST-CONTRAST 0.2)
(:MEAN-INTENSITY 0.5 :TEST-CONTRAST 0.2)
(:MEAN-INTENSITY 0.5 :TEST-CONTRAST 0.2)

