https://docs.google.com/document/d/1TsdleZn2gIeT45iNA-EfLWKjtyYKAGdHiCbBbYEorGo/edit?usp=sharing
https://docs.google.com/document/d/1G9UBxCQxYYn3Hubv7uqSfcUzeEtWeF8ZoSncB1IOC4c/edit Плохов Иван
