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
__author__ = 'Lokab'
string=raw_input()
a=0
b=0
c=0
d=0
while True:
    string=int(string)+1
    string=str(string)
    a=string.count(str(string[0]))
    b=string.count(str(string[1]))
    c=string.count(str(string[2]))
    d=string.count(str(string[3]))
    if(a==1 and b==1 and c==1 and d==1):print string;raise SystemExit(0)
