for i in range(ord('A'),ord('Z')+1):
  str1=str(i)
  str2=str1[::-1]
  if(str1==str2):
    print(chr(i))

/**************************************************************
	Problem: 1973
	User: admin
	Language: Python
	Result: Accepted
	Time:47 ms
	Memory:34244 kb
****************************************************************/