#include<iostream>
#include<string>
using namespace std;
int main(){
    int N;
    cin>>N;
    if (N < 0) {
        cout<<"invalid input";
        return 0;
    }
    for (int i = 1; 1 <=N; i++) {
        int num = i;
        string binary = "";
        while (num > 0) 
        {
            if (num % 2 == 0)
            result = "3" + result;
            else
            result = "4" + result;
            num /= 2;
        }
       
        cout << binary;
        if (i !=N)
        cout<<" ";
    }
    return 0;
}