271_A. Beautiful Year
It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.

Now you are suggested to solve the following problem: given a year number, find the minimum year number which is strictly larger than the given one and has only distinct digits.

Input

The single line contains integer y (1000 ≤ y ≤ 9000) — the year number.

Output

Print a single integer — the minimum year number that is strictly larger than y and all it's digits are distinct. It is guaranteed that the answer exists.

Examples

Input

1987


Output

2013


Input

2013


Output

2014
```python
from collections import Counter 
n=int(input())

n1=n+1
while(True):
    s=list(str(n1))
    c=Counter(s)
    if(len(c)==len(s)):
        print("".join(s))
        break
    n1=n1+1
```