error:Oops, try again. Your function crashed on  as input because your function throws a "list.remove(x): x not in list" error.Please help
Please post your code
I solved the problem but still, thanks
sequence = 
for f in sequence:
if f%2 -1: //filters out non even(odd),alternative to if f%2 == 0:
sequence.append(f) //populates the sequence list with even numbers
return sequence //returns list with even numbers.