#include<iostream>
#include<string>
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=1;i<=N;i++){
        string current =q.front();
        q.pop();
        
        cout<<current;
        if (i!=N)
          cout<<" ";
        q.push(current+"3");
        q.push(current+"4");
    }
    return 0;
}