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
import sys

#sys.stdin = open("test.inp","r")

y = int(input())

for i in range(y + 1,10000) :
    a = int(i % 10)
    b = int(int(i / 10) % 10)
    c = int(int(i / 100) % 10)
    d = int(int(i / 1000) % 10)
    if a != b and a != c and a != d and b != c and b != d and c != d :
        print(i)
        sys.exit(0)

