{
    "ch-1" : [
        {
            "function" : "countcommon",
            "multiarg" : true,
            "arguments" : [
                [ "perl", "weekly", "challenge" ],
                [ "raku", "weekly", "challenge" ]
            ],
            "result" : 2
        },
        {
            "multiarg" : true,
            "arguments" : [
                [ "perl", "raku", "python" ],
                [ "python", "java" ]
            ],
            "result" : 1
        },
        {
            "multiarg" : true,
            "arguments" : [
                [ "guest", "contribution" ],
                [ "fun", "weekly", "challenge" ]
            ],
            "result" : 0
        }
    ],
    "ch-2" : [
        {
            "function" : "decodexor",
            "multiarg" : true,
            "arguments" : [
                [ 1, 2, 3 ],
                1
            ],
            "result" : [ 1, 0, 2, 1 ]
        },
        {
            "multiarg" : true,
            "arguments" : [
                [ 6, 2, 7, 3 ],
                4
            ],
            "result" : [ 4, 2, 0, 7, 4 ]
        }
    ]
}