task3

def evenFirst(l1):
    l = len(l1)
    even = []
    odd = []
    output = []
    for i in range(l):
        for j in range(l):
            if l1[i][j] % 2 == 0:
                even.append(l1[i][j])
            else:
                odd.append(l1[i][j])
    all = even + odd
    def divide_chunks(l, n):
        for i in range(0, len(l), n):
            yield l[i:i + n]

    return list(divide_chunks(all,l))