#include<iostream>
using namespace std;
int main()
{
    int height;
    cin>>height;
    if(height<1||height>26)
    {
        cout<<"Ivalid input";
    }
    else{
        for(int i=1;i<=height;i++)
        {
            cout<<char('a'+j)<<" ";
        }
        cout<<endl;
    }
    return 0;
}