##The Fibonacci Sequence is computed based on the following formula:
##f(n)=0 if n=0
##f(n)=1 if n=1
##f(n)=f(n-1)+f(n-2) if n>1
##
##Please write a function returning the Fibonacci
##Sequence in comma separated form

##Example:
##fibonacci(7)
##The output of the program should be:
##0,1,1,2,3,5,8,13

def fibonacci(num):
