Use Python3

in mathematics, the square root of a negative number is not real; in Python, therefore, passing such a value to the square root function returns a value known as NaN (not-a-number).

Write the code that reads a value, the area of some square, into a variable named areaOfSquare, and prints out the length of the side of that square.

HOWEVER: if any value read in is not valid input, just print the message "INVALID".