#include <iostream>
using namespace std;

void func(int* p, int n);

int main() {

    int arr[6] = { 0 };
    for (int i = 0; i < 6; i++) {
        cin >> arr[i];
    }

    func(arr, 6);

    for (int i = 0; i < 6; i++) {
        if (i == 5) {
            cout << arr[i] << endl;
        }
        else {
            cout << arr[i] << " ";
        }
    }

    return 0;
}

void func(int* p, int n) {

    // write your code here......
    int id = 0;
    for(int i= 0;i<n;i++)
    {
        if(p[i]!=0)
        {
            int temp = p[i];
            p[i] = p[id];
            p[id++] = temp;
            
        }

    }

}