fun main() {
    var count = 0
    val digits = listOf('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C')

    for (a in digits) {
        for (b in digits) {
            for (c in digits) {
                for (d in digits) {
                    for (e in digits) {
                        for (f in digits) {
                            val sumFirstHalf = digits.indexOf(a) + digits.indexOf(b) + digits.indexOf(c) + digits.indexOf(d) + digits.indexOf(e) + digits.indexOf(f)
                            for (g in digits) {
                                for (h in digits) {
                                    for (i in digits) {
                                        for (j in digits) {
                                            for (k in digits) {
                                                for (l in digits) {
                                                    val sumSecondHalf = digits.indexOf(g) + digits.indexOf(h) + digits.indexOf(i) + digits.indexOf(j) + digits.indexOf(k) + digits.indexOf(l)
                                                    if (sumFirstHalf == sumSecondHalf) {
                                                        count++
                                                    }
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    println(count)
}