#include <iostream>
#include <iomanip>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n<=0){
        cout<<"Invalid input";
        return 0;
    }
    queue<string> q;
    q.push("3");
    q.push("4");
    for(int i=0;i<n;i++){
        string s=q.front();
        q.pop();
        cout<<s;
        if(i !=n-1) cout<<" ";
        q.push(s+"3");
        q.push(s+"4");
    }
    return 0;
}