What is the output of program №11

The task requires determining what text will appear in the console after executing a chain of functions on an array of integers. The array is sorted, only positive elements are selected, each is converted to a string, and then the strings are concatenated into one without separators in reverse order. Output the resulting string.

import UIKit

let numbers = [-2, 3, 1, -4, -6, 5]

let output = numbers
    .sorted()
    .filter { $0 > 0 }
    .map { String($0) }
    .reduce("") { $1 + $0 }

print(output)