// FILE: JavaClass.java

import java.util.*;

class JavaClass {
    public static void sortIntList(List<Integer> list, Comparator<Integer> comparator) {
        Collections.sort(list, comparator);
    }
}

// FILE: 1.kt

import java.util.*

fun box(): String {
    val list = ArrayList(Arrays.asList(3, 2, 4, 8, 1, 5))
    val expected = ArrayList(Arrays.asList(8, 5, 4, 3, 2, 1))
    JavaClass.sortIntList(list, { a, b -> b - a })
    return if (list == expected) "OK" else list.toString()
}