#include <bits/stdc++.h>
using namespace std;

#define rep(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define ALL(v) (v).begin(),(v).end()
using ll=long long int;
const int inf = 0x3fffffff; const ll INF = 0x1fffffffffffffff; const double eps=1e-12;
template<typename T>inline bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
template<typename T>inline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}



int main(){
    int n;
    cin>>n;
    queue<char> que[4];
    que[0].push('A');
    que[0].push('E');
    que[1].push('B');
    que[2].push('C');
    que[3].push('D');

    rep(i,0,n){
        char c=que[i&3].front();
        que[i&3].pop();
        que[(i+1)&3].push(c);
    }
    rep(i,0,4){
        while(!que[i].empty()){
            char c=que[i].front();
            que[i].pop();
            cout<<c;
        }
        cout<<'\n';
    }
    return 0;
}