```python
a, b = map(int, input().split())
i = a
if i <= 2:
print(2)
i = 3
if i % 2 == 0:
i = i + 1
while i <= b:
is_prime = True
for o in range(2, int(i ** 0.5) + 2):
if i % o == 0:
is_prime = False
break
if is_prime and str(i) == str(i)[::-1]:
print(i)
i = i + 2
```
by gghvcchb @ 2024-02-16 15:53:37