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 sys

def checking(x):
    s=str(x)
    l=len(s)
    c=1
    for i in range(0,l):
        a=int(s[i])
        for j in range(i+1,l):
            if a==int(s[j]):
                c=0
                break
    return c

n=int(raw_input())
count=0;
while count==0:
    n=n+1
    count=checking(n)
print n
