I tried only ask people for some what I would consider kind of minimal level performance to make the challenge as feasible as possible you know bottom line is you're not gonad it doesn't matter if I tell you can do it and so to make it worse you know Lifeforce T-Boost you're just making it you know tougher for people toot to comply but so two weeks is in my opinion you know very good choice it fits into people's natural you know time frames people can organize our lives in terms of weeks and service a one-week that's obvious sign up three weeks is a week too long so two weeks is fine you have one more question coffee yes you want coffee yes I'll I want a pica I'm as is their bad side the coffee not what's lets the %ah real effect on brain performance 0 I'm well caffeine is a insecticide I mean.