type Stack interface {
    // Push puts an item on the top of the stack
    Push(item interface{})
    // Pop removes an item from the top of the stack
    Pop() interface{}
    // Peek looks at the item at the top of the stack but does not remove the item
    Peek() interface{}
    // Empty returns if the stack has items or not
    Empty() bool
}

func New() Stack

func New() Queue

type Queue interface {
    // Add puts an item on the queue
    Add(item interface{})
    // Remove takes the first time off of the queue
    Remove() interface{}
    // Peek returns the first on the queue
    Peek() interface{}
    // Empty returns true or false if the queue contains values
    Empty() bool
}