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
import math
x=int(input())
e=1
while(e<2):
    x+=1
    a=int(x/1000)
    b=int((x%1000)/100)
    c=int((x%100)/10)
    d=int(x%10)
    if (a!=b and\
        a!=c and\
        a!=d and\
        b!=c and\
        b!=d and\
        c!=d):
        print(x)
        e+=1
