numbers = [1, 15, 7, 3, 8, 8, 19, 5, 12, 8, 2, 6, 8]
# numbers = [1, 15, 8, 8, 8, 8, 7, 3, 19, 5, 12, 2, 6]

counter = 1
prev = numbers.pop()

while len(numbers) > 0 and counter < 4:
    next = numbers.pop()
    if prev == next: 
        counter = counter + 1
    else:
        counter = 1
        prev = next

if counter == 4: 
    print "Found repeated number"
else: 
    print "No repeated number found"