p03416 AtCoder Beginner Contest 090 - Palindromic Numbers
Find the number of palindromic numbers among the integers between A and B (inclusive). Here, a palindromic number is a positive integer whose string representation in base 10 (without leading zeros) reads the same forward and backward.

Constraints

* 10000 \leq A \leq B \leq 99999
* All input values are integers.

Input

Input is given from Standard Input in the following format:


A B


Output

Print the number of palindromic numbers among the integers between A and B (inclusive).

Examples

Input

11009 11332


Output

4


Input

31415 92653


Output

612
```python
a,b=map(int,input().split())
ans=0
for i in range(a,b+1):
  ir=str(i)
  if ir == ir[::-1]:
    ans+=1
print(ans)

```