Educational project (Arthur Timoshin)
Verification
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Please demonstrate that you are human, not a spider or robot

          __    __  ______  __  __            _____ 
    /\   /_ |  / / |____  |/_ |/_ |    /\    | ____|
   /  \   | | / /_     / /  | | | |   /  \   | |__  
  / /\ \  | || '_ \   / /   | | | |  / /\ \  |___ \ 
 / ____ \ | || (_) | / /    | | | | / ____ \  ___) |
/_/    \_\|_| \___/ /_/     |_| |_|/_/    \_\|____/ 

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