>>> from balla import balla

--ini

>>> it = balla([3, 2, 3, -1, 7, -4], 0)
>>> next(it)
0
>>> next(it)
3
>>> next(it)
2
>>> next(it)
5

>>> it = balla([3, 2, 3, -1, 7, 1], 0)
>>> it == iter(it)
True
>>> list(it)
[0, 3, 2, 5]

--fi

>>> it = balla([3, 2, 3, -1, 7, -7], 0)
>>> it == iter(it)
True
>>> list(it)
[0, 3, 2, 5]

>>> it = balla([3, 2, 3, -1, 7, -4], 1)
>>> it == iter(it)
True
>>> next(it)
1
>>> next(it)
3
>>> next(it)
2
>>> next(it)
5
>>> next(it)
1
>>> next(it)
3
>>> next(it)
2

>>> it == iter(it)
True

>>> it = balla([1, 3, 5, 3, -1, 3, -4, -2, 1, 1], 1)
>>> it == iter(it)
True
>>> list(it)
[1, 4, 3, 6, 2, 7, 5, 8, 9]