# Write a Python program to extract specified number of elements from a given list, which follows each other continuously.  
from itertools import groupby 

def extract_elements(nums, n):
    result = [i for i, j in groupby(nums) if len(list(j)) == n] 
    return result

nums1 = [1, 1, 3, 4, 4, 5, 6, 7]
n = 2
print("Original list:")
print(nums1)
print("Extract 2 number of elements from the said list which follows each other continuously:") 
print(extract_elements(nums1, n))
nums2 = [0, 1, 2, 3, 4, 4, 4, 4, 5, 7]
n = 4
print("Original lists:")
print(nums2)
print("Extract 4 number of elements from the said list which follows each other continuously:") 
print(extract_elements(nums2, n))
