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 czy_poprawny_rok(rok):
    lista = []
    wynik = rok
    while rok > 0:
        if rok % 10 in lista:
            return False
        lista.append(rok%10)
        rok = rok // 10
    return True

def piekny_rok(rok):
    wynik = rok+1
    while not czy_poprawny_rok(wynik):
        wynik += 1
    return wynik

print(piekny_rok(int(input())))
