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
    
i = int(input())
j = i + 1
while j < 9999:
    satu = j % 10
    puluh = (j//10) % 10 
    ratus = (j//100) % 10
    ribu = (j//1000) % 10

    j+=1
    if (satu!=puluh and satu!=ratus and satu!=ribu and puluh!=ratus and puluh!=ribu and ratus!=ribu):
        print(str(ribu) + str(ratus) + str(puluh) + str(satu))
        break