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 re
year = input()
i = True
while i:
   year = str(int(year)+1)
   new_year = int(year)
   a3 = str(new_year % 10)
   new_year = int(new_year / 10)
   if not re.search(a3,str(new_year)):
       a2 = str(new_year % 10)
       new_year = int(new_year / 10)
       if not re.search(a2,str(new_year)):
           a1 = str(new_year % 10)
           new_year = int(new_year / 10)
           if not re.search(a1, str(new_year)):
               break
print(year)
    		  		  		  				  	  			 		