Adding certain numbers to their reversals sometimes produces a palindromic number. 
For instance, 241 + 142 = 383.

Sometimes, we have to repeat the process. 

For instance 84+48=132, 132+231=363

Write a program that finds both two-digit numbers for which this process must be repeated more than 20 times to obtain a palindromic number.

for i in range(10,101):

s=str(i)

for j in range(20):
new=s+s[::-1]
s=new
if new==new[::-1]:
flag=True
if not flag:
print(i)
결과 = 아무것도 안떠요.
if not flag 하면 10 부터 100까지 쭈욱 뜨고요.