learning go by following all exercises from this document https://docs.google.com/document/d/1ckYpi6hcRkaBUEk975f54oGsHYHu7GhzOk7-nOrkNxo/edit#
learning go by following all exercises from this document https://docs.google.com/document/d/1ckYpi6hcRkaBUEk975f54oGsHYHu7GhzOk7-nOrkNxo/edit#