# tested

from boa.builtins import keys, concat


def Main():

    j = 10

    d = {
        "a": 1,
        "b": 4,
        4: "blah",
        "m": j,
        "z": [1, 3, 4, 5, "abcd", j],
        "mcalll": mymethod(1, 4),
    }

    output = ""
    for item in keys(d):
        output = concat(output, item)

    d2 = {"t": 5, "r": 6, "s": "a"}

    for item in d2.keys():

        output = concat(output, item)

    return output


def mymethod(a, b):

    return a + b