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

 __   ___    ___               __     __   ____   ______ 
/_ | / _ \  / _ \     /\      / /    / /  |  _ \ |  ____|
 | || | | || (_) |   /  \    / /_   / /_  | |_) || |__   
 | || | | | > _ <   / /\ \  | '_ \ | '_ \ |  _ < |  __|  
 | || |_| || (_) | / ____ \ | (_) || (_) || |_) || |     
 |_| \___/  \___/ /_/    \_\ \___/  \___/ |____/ |_|     

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