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
a=0
b=0
c=0
d=0
n=input()+1
a=n/1000
b=(n/100)%10
c=(n/10)%10
d=n%10
while a==b or a==c or a==d or b==c or b==d or c==d:
        n+=1;
        a=n/1000
        b=(n/100)%10
        c=(n/10)%10
        d=n%10
print n        
    