Sample Run #1:
    Enter a value (blank line to quit): Cat
    Enter a value (blank line to quit): Dog
    Enter a value (blank line to quit): Mouse
    Enter a value (blank line to quit):
    Mouse
    Dog
    Cat

    Sample Run #2:
    Enter a value (blank line to quit): 30
    Enter a value (blank line to quit):
    30
    Sample Run #3:
    Enter a value (blank line to quit): h
    Enter a value (blank line to quit): e
    Enter a value (blank line to quit): l
    Enter a value (blank line to quit): l
    Enter a value (blank line to quit): o
    Enter a value (blank line to quit):
    h
    e
    l
    l
    o