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) {
    
    int i,j;
    int result[6]={0};
    j=0;
    for(i=0;i<=5;i+=1){
        if(p[i]!=0){
            result[j]=p[i];
            j+=1;
        }
    }
    
    for(i=0;i<=5;i+=1){
        if(p[i]==0){
            result[j]=p[i];
            j+=1;
        }
    }
    
    for(i=0;i<=5;i+=1){
        p[i]=result[i];
    }

    // write your code here......
    

}