Enter queue commands (e)nqueue, (d)equeue, (s)ize (q)uit
You entered  e Neil

Queue contains:
        Neil

enter command:  You entered  e Laura

Queue contains:
        Neil
        Laura

enter command:  You entered  e Mike

Queue contains:
        Neil
        Laura
        Mike

enter command:  You entered  e Diane

Queue contains:
        Neil
        Laura
        Mike
        Diane

enter command:  You entered  d

Queue contains:
        Laura
        Mike
        Diane

enter command:  You entered  d

Queue contains:
        Mike
        Diane

enter command:  You entered  e Karen

Queue contains:
        Mike
        Diane
        Karen

enter command:  You entered  s
size = 3

Queue contains:
        Mike
        Diane
        Karen

enter command:  You entered  q