require 'pry'


test = Array.new
test.push('')
test.push('FB')
test.push('FF')
test.push('')
test.push('FB')
test.push('FF')

first = 'FF'
second = 'FB'
third = ''

binding.pry

test.sort do |left,right|
	if left == first && right == second
		-1
	elsif left == first && right == third
		-1
	elsif left == second && right == third
		-1
	end

end

puts test