(symbols.py):

Design a function that accepts a text argument and determines if it is an acceptable sequence by either returning True or False. The text argument will be composed of + and = symbols with several letters between them (ie. ++d+===+c++==a) and for the string to be True each letter must be surrounded by a + symbol. So the given text is False, as the last a is not surrounded by +. The text argument will not be empty and will have at least one letter. Sample Test Cases Input: +d+=3=+s+ Output: True Input: f++d+ Output: False