Write a function that creates a stream that endlessly cycles through all the elements of a single, given stream. You can use a local environment to store a reference to the original stream through which you must cycle and a helper function that uses this stored reference when it runs out of elements to cycle through.

do not use any of these common illegal characters/symbols:

# pound

% percent

& ampersand

{ left curly bracket

} right curly bracket

\ back slash

< left angle bracket

> right angle bracket

* asterisk

? question mark

/ forward slash

  blank spaces

$ dollar sign

! exclamation point

' single quotes

" double quotes

: colon

@ at sign