def GoldTa(input):
  L = [chr(i) for i in range(65, 91)] # 大写字母A--Z
  idA = 65 # 从A开始
  # ord()函数将字母转换为Unicode数值
  idInput = ord(input)
  num = idInput - idA + 1 # 输入的字符个数
  tempResult = ""
  for C in range(0, num):
    for C1 in range(0, C): # 左 [ABC]
      tempResult = tempResult + L[C1]
    tempResult = tempResult + L[C] # 中 [D]
    for C2 in range(C - 1, -1, -1): # 右 [CBA]
      tempResult = tempResult + L[C2]
    for C3 in range(num - 1 - C): # 每行空格
      tempResult = " " + tempResult
    print(tempResult) # 输出
    tempResult = "" # 清空临时结果

while True:
  char = input("请输入一个大写字母:")
  if char.isupper():
    GoldTa(char)
    continue
  else:
    print("输入错误,请重新输入")