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 dist(n):
    a = n%10
    b = int(n/10)%10
    c = int(n/100)%10
    d = int(n/1000)%10
    if(a==b or a==c or a==d or b==c or b==d or c==d):
        return False;
    else:
        return True;

y = int(input())
flag = False
while(not flag):
    y += 1
    if(dist(y)):
        flag = True
print(y)