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
n=input()
s,r='',0
for i in range(1,10):
    for j in range(10):
        for k in range(10):
            for f in range(10):
                if i!=j and i!=k and i!=f and j!=k and j!=f and k!=f:
                    s=str(i)+str(j)+str(k)+str(f)
                    if int(s)>int(n):print(s);exit()
print(s)