from collections import deque

a,b,c,d=deque(),deque(),deque(),deque()
l=[a,b,c,d]
a.append("A")
a.append("E")
b.append("B")
c.append("C")
d.append("D")
n=int(input())
for i in range(n):
    s=l[i%4].popleft()
    l[(i+1)%4].append(s)

l=[list(a),list(b),list(c),list(d)]
p=[]
for x in l:
    ans=""
    for a in x:
        ans+=a
    print(ans)