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
# list_l = [0,1,2,3,4,5,6,7,8,9]
n = str(input())
i = 0

n = int(n) + 1
n = str(n)

while i == 0 :
    if n[0] != n[1] and n[0] != n[2] and n[0] != n[3] and n[1] != n[2] and n[1] != n[3] and n[2] != n[3]:
        i = 1
    else:
        n = int(n) + 1
        n = str(n)

print(n)

             
