package main

import . "fmt"

func main() {
	var k int
	Scan(&k)
	q:=[][]rune{
		[]rune("AE"),
		[]rune("B"),
		[]rune("C"),
		[]rune("D"),
	}
	for i:=0;i<k;i++{
		q[(i+1)%4]=append(q[(i+1)%4],q[i%4][0])
		q[i%4]=q[i%4][1:]
	}
	for _,r:=range q {
		Println(string(r))
	}
	
}