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 check(year):
    arr=[]
    year=str(year)
    for y in year:
        if y not in arr:
            arr.append(y)
    if len(arr)==4:
        return True
    else:
        return False

from sys import stdin
year=int(stdin.readline())
year+=1
while not check(year):
    year+=1
print(year)