---

#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    int n, k;
    std::cin >> n >> k;

    std::vector<int> numbers(n);
    for (int i = 0; i < n; ++i) {
        std::cin >> numbers[i];
    }

    int index = -1;
    for (int i = 0; i < n; ++i) {
        if (numbers[i] == k) {
            index = i;
            break;
        }
    }

    if (index != -1) {
        std::cout << index << std::endl;
    } else {
        for (int i = n - 1; i >= 0; --i) {
            std::cout << numbers[i] << (i == 0 ? "" : " ");
        }
        std::cout << std::endl;
    }

    return 0;
}