Messrs Butcher, Baker, Carpenter and Plumber are currently attending another convention. No-one is currently, nor ever has been in the same profession as their name and no-one has had the same profession twice. Alan is now a butcher, whereas Mr Brian Butcher used to be a baker. The person who is now a carpenter used to be a butcher. Charles has never been a baker, Mr Darren Carpenter has never been a butcher and Mr Baker is not now a carpenter. Can you determine their full names, along with their current and previous professions?
Hint: Tops of thermometers can't be filled unless the bottoms are.
What is the next letter in this sequence:
E H L O S ==?==
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Hint: This is just a sequence of letters.
Skip 2 and then 3 letters alternately.