from collections import deque

k = int(input())
que0 = deque(['A','E'])
que1 = deque(['B'])
que2 = deque(['C'])
que3 = deque(['D'])
x = 0
for i in range(k):
  if x%4 == 0:
    que1.append(que0[0])
    del que0[0]
  elif x%4 == 1:
    que2.append(que1[0])
    del que1[0]
  elif x%4 == 2:
    que3.append(que2[0])
    del que2[0]
  else:
    que0.append(que3[0])
    del que3[0]
  x += 1

print(''.join(que0))
print(''.join(que1))
print(''.join(que2))
print(''.join(que3))