{
    "ch-1" : [
        {
            "function" : "middleindex",
            "arguments" : [ 2, 3, -1, 8, 4 ],
            "result" : 3
        },
        {
            "arguments" : [ 1, -1, 4 ],
            "result" : 2
        },
        {
            "arguments" : [ 2, 5 ],
            "result" : -1
        }
    ]
}