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 convert(s): 
    str1 = "" 
    return (str1.join(s))
if __name__=="__main__":
    inp=input()
    num=int(inp)
    num=num+1
    s=str(num)
    st={s[0],s[1],s[2],s[3]}
    while st!=4:
        s=str(num)
        st={s[0],s[1],s[2],s[3]}
        if len(st)==4:
            break
        num=num+1
    print(s)