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())
b=a+1;
while b<1000000:
    c=b//1000;
    d=(b-c*1000)//100;
    e=(b-c*1000-d*100)//10;
    f=(b-c*1000-d*100-e*10);
    if(c==d or c==e or c==f or d==e or d==f or e==f):
        b+=1
    else :
        print(b)
        exit()
