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 ss():
    global n
    log1=False
    for i in range(3):
        for j in range(i+1,4):
            if n[i]==n[j]:
                log1= True
    if log1==True:
        return False
    else:
        return True
log=False
n=input()
while log!=True:
    n=str(int(n)+1)
    log=ss()
print(n)