[
    {
        "n": 7,
        "m": 4,
        "k": 5,
        "s": "xyzxyz"
    },
    {
        "n": 5,
        "m": 3,
        "k": 3,
        "s": "abcde"
    },
    {
        "n": 6,
        "m": 2,
        "k": 4,
        "s": "aabbcc"
    },
    {
        "n": 8,
        "m": 3,
        "k": 2,
        "s": "abcdefgh"
    }
]