#include <bits/stdc++.h>
#define inf (0x7f7f7f7f)
#define Max(a, b) ((a) > (b) ? (a) : (b))
#define Min(a, b) ((a) < (b) ? (a) : (b))
typedef long long ll;
using namespace std;
template <class T>
inline void read(T &x){
    int ch = 0, f = 0; x = 0;
    for(; !isdigit(ch); ch = getchar()) if(ch == '-') f = 1;
    for(; isdigit(ch); ch = getchar()) x = x * 10 + ch - 48;
    if(f) x = -x;
}
int n;
const int N = 5005;
char a[N][15];
bool check(int i){
    int dif = 0;
    for(int k = 0; k < 10; k++) if(a[i - 1][k] != a[i][k]) dif++;
    if(dif != 1) return false;
    for(int j = 1; j < i - 1; j++){
        int diff = 0;
        for(int k = 0; k < 10; k++) if(a[i][k] != a[j][k]) diff++;
        if(diff <= 1) return false;
    }
    return true;
}
int main(){
    srand(time(NULL));
    read(n);
    for(int i = 0; i < 10; i++) a[1][i] = 'a' + rand() % 26;
    for(int i = 2; i <= n; i++){
        do{
            for(int j = 0; j < 10; j++){
                a[i][j] = a[i - 1][j];
            }
            int pos = rand() % 10;
            a[i][pos] = 'a' + rand() % 26;
        }while(!check(i));   
    }
    for(int i = 1; i <= n; i++){
        for(int j = 0; j < 10; j++) putchar(a[i][j]);
        puts("");
    }
    return 0;
}