def couple(lst1, lst2):
    "Return a list that contains lists with i-th elements of two sequences\n    coupled together.\n    >>> lst1 = [1, 2, 3]\n    >>> lst2 = [4, 5, 6]\n    >>> couple(lst1, lst2)\n    [[1, 4], [2, 5], [3, 6]]\n    >>> lst3 = ['c', 6]\n    >>> lst4 = ['s', '1']\n    >>> couple(lst3, lst4)\n    [['c', 's'], [6, '1']]\n    "
    assert (len(lst1) == len(lst2))
    a = []
    for i in range(len(lst1)):
        a.append([lst1[i], lst2[i]])
    return a
Return a list that contains lists with i-th elements of two sequences
coupled together.
>>> lst1 = [1, 2, 3]
>>> lst2 = [4, 5, 6]
>>> couple(lst1, lst2)
[[1, 4], [2, 5], [3, 6]]
>>> lst3 = ['c', 6]
>>> lst4 = ['s', '1']
>>> couple(lst3, lst4)
[['c', 's'], [6, '1']]
def couple(lst1, lst2):
    "Return a list that contains lists with i-th elements of two sequences\n    coupled together.\n    >>> lst1 = [1, 2, 3]\n    >>> lst2 = [4, 5, 6]\n    >>> couple(lst1, lst2)\n    [[1, 4], [2, 5], [3, 6]]\n    >>> lst3 = ['c', 6]\n    >>> lst4 = ['s', '1']\n    >>> couple(lst3, lst4)\n    [['c', 's'], [6, '1']]\n    "
    assert (len(lst1) == len(lst2))
    a = []
    for i in range(len(lst1)):
        a.append([lst1[i], lst2[i]])
    return a