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
def AoHermoso(N):
    A = N
    U = A%10
    A = A//10
    D = A%10
    A = A//10
    C = A%10
    UM = A//10
    if U != D and U!= C and U!=UM and D != C and D!= UM and C!=UM:
        return 1
    else:
        return 0    

L = int(input())
O = 0
if 1000<=L<=9000:
    while O !=1:
        L+=1
        O = AoHermoso(L)
    print(L)