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 jojo(x,snb):

    for i in range(10):
        if x.count(str(i))==0 or x.count(str(i))==1:
            snb+=1
    if snb==10:
        
        return 1
    else:
        return 0

n=input()
sn=int(n)
for i in range(sn,10000):
    ci=str(i+1)

    ss=0
    if jojo(ci,ss)==1:
        print(ci)
        break
    
    
