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 math
base = int(input())
for i in range(base+1,9999):
    a = math.floor(i / 1000)
    b = math.floor((i-1000*a) / 100)
    c = math.floor((i-1000*a-100*b)/10)
    d = i - 1000*a - 100*b - 10*c
    lst = [a,b,c,d]
    if len(set(lst)) == 4:
        year = i
        break
    else:
        continue
print(int(year))