Each chef at "Sushi Emperor" prepares $15$ regular rolls and $20$ vegetarian rolls daily. On Tuesday, each customer ate $2$ regular rolls and $3$ vegetarian rolls. By the end of the day, $4$ regular rolls and $1$ vegetarian roll remained uneaten. **How many chefs and how many customers were in "Sushi Emperor" on Tuesday?** There were [[☃ numeric-input 1]] chefs and [[☃ numeric-input 2]] customers.