cards = ([False in i in range(13)] for j in range(4))
pattern = ['S','H','C','D']

n = int(input())

for i in range(n):
  x, y = input().split()
  y = int(y)
  cards[pattern.index(x)][y-1] = True
  
for i in range(4):
  for j in range(13):
    if cards[i][j] == False:
      print(pattern[i][j-1])
