#include<iostream>
#include<string>
using namespace std;

int main(){
    int n;
    cin >> n;
    
    if(n<a) {
        cout<<"invalid input";
        return 0;
        
    }
    for (int i = 1; i <= n; i++){
        int num = i;
        string binary = "";
        
        while (num > 0) {
            binary = char('0' + (num%2))+ binary;
            num/= 2;
            
        }   
        for (char &c : binary){
            if (c == '0')
            cout<< '3';
            else
            cout << '4';
            
        }
        if(i !=n)
        cout<<" ";
    }
    return 0;
}