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
y=input()
needed = 0
flg = True
i = int(y)+1
while(True):
    k=str(i)
    for j in range(len(k)):
        flg = True
        if k.count(k[j]) > 1:
            flg = False
            break
    if flg == True:
        needed = int(k)
        break
    i+=1    
        
print(needed)