What is the difference between vet and VeChain?

Could you please explain to me the distinction between vet and VeChain? I've heard of VeChain, a blockchain platform for supply chain management, but I'm not entirely clear on what vet represents. Is vet a token or a currency that's associated with VeChain? If so, how does it function within the VeChain ecosystem? Additionally, are there any significant differences in terms of utility or value proposition between vet and VeChain? Thank you for clarifying this for me.