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
a=int(input())

for k in range (8000):
        ap=1
        sal=0
        a=a+1
        b=str(a)
        b=" ".join(b)
        b=b.split()
        for i in range (4):
                c=b[i]
                for t in range(i+1,4):
                        if  c== b[t]:
                                sal=1
                                break
                if sal==1:
                        ap=0
                        break
        if ap==1:
                break
for y in range(4):
        b[y]=str(b[y])
yonax="".join(b)
        
print(yonax)