Function: invert(product(numbers("xxy") if numbers("xyx") > numbers('yxy') else numbers("xxr") if numbers('yxy') > numbers("xxr") else numbers("xyx"), numbers("xyx") if numbers("xxr") > numbers('yxy') else numbers("xxy")) if numbers("xyx") > numbers('yxy') if numbers("xxr") > numbers("xyx") else numbers("xxy") else numbers("xxr") if numbers("xxr") if numbers('yxy') > numbers("xyx") else numbers("xxy") > numbers('yxy') else numbers("xyx"))