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
from collections import OrderedDict
t=input()
m=""
c=0
flag=0
x=int(t)+1
while(x>=int(t) and x<9876):
    x=str(x)
    m=''.join(OrderedDict.fromkeys(x).keys())
    c=len(m)
    if c==4:
        flag=1
        break
    n=int(x)
    n+=1
    x=n
if flag==1:
    x=int(m)
    print(x)