import random
import datetime

ALP=["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]

r=random.choice(ALP)
alp=""

for i in ALP:
    if i != r:
      alp=alp+i
print(alp)
st=datetime.datetime.now()
ans=input("抜けているアルファベットは？")

if ans == r:
  print("正解です")
  et=datetime.datetime.now()
  print(str((et-st).seconds)+"秒かかりました")
else:
  print("違います")
