import random
bildi=False
tahmin=0
a=0
while a==0 :
tut1 = str(random.randint(1000,9999))
if tut1[0] != tut1[1] and tut1[0] != tut1[2] and tut1[0] != tut1[3] and tut1[1] != tut1[2] and tut1[1] != tut1[3] and tut1[2] != tut1[3] :
a=1
while (bildi==False):
sayi = input("4...