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=int(input())
a=n%10
b=(n%100)//10
c=(n%1000)//100
d=(n%10000)//1000
s=set()
while len(s)<4:
    a=a+1
    if a==10:
        a=0
        b=b+1
        if b==10:
            b=0
            c=c+1
            if c==10:
                c=0
                d=d+1
    s={a,b,c,d}
print(int(str(d)+str(c)+str(b)+str(a)))