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
s=input()
t=int(s)
d=0
for i in range(t+1,9013):
    s1=str(i);
    d=0
    for j in range(0,4):
        for k in range(j+1,4):
            if(s1[j]!=s1[k]):
                d=d+1
            if(d==6):
                print(s1)
                exit(0);