question: If one of the paired images contains one black brace and one white brace.
#1 return images 
#2 return braces in  #1 
#3 return #2 that are black 
#4 return #2 that are white 
#5 return number of  #3 for each  #1 
#6 return number of  #4 for each  #1 
#7 return #1 where  #5 is equal to  one   
#8 return #1 where  #6 is equal to  one   
#9 return #1 in  both  #7 and #8 
#10 return number of  #9 
#11 return if  #10 is equal to  one