Lets or Letts: How To spell?
The word Lets is misspelled against Letts, a noun meaning "An Indo-European people, allied to the Lithuanians and Old Prussians, and inhabiting a part of the Baltic provinces of Russia."
Letts has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings le & s which should not be misspelled with single 'T'
Wrong Spelling:  le-t-s  Correct Spelling:  le-tt-s 
Explore spell check of Letts to spell without errors.