count occurrence of numbers in a sequence and return corresponding value

[python_newbie09]

What have you tried?

I have tried something like below but I am stuck at how to return the corresponding value
X = [2,2,2,2,2,3,4,5,6,6,6,6,6,7,8]
Y = [4,4,4,4,4,0,0,0,5,5,5,5,5,0,0]

count_sequence = [sum(1 for _ in group) for _, group in groupby(X)]
print(count_sequence)
for i in count_sequence:
    if i>= 5:
        print(Y[i]) #not sure if this is correct