que = []
que.append(["A", "E"])
que.append(["B"])
que.append(["C"])
que.append(["D"])

K = int(input())

for i in range(K):
    j = i % 4
    k = (j + 1) % 4
    s = que[j].pop(0)
    que[k].append(s)

for i in range(4):
    print(*que[i], sep = "")