#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;i <= N;i++){
        int num=i;
        string binary="";
        while(num>0){
            binary=char((num%2)+'0')+binary;
            num/=2;
        }
        for (int=j;j<binary.length();j++){
            if (binary[j]=='0')
                binary[j]='3';
                else
                binary[j]='4';
        }
        cout<<binary;
        if(i!=N)
        cout<<"";
    }
    return 0;
}