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
years = int(input())
while(True):
   years+=1
   a = years//1000%10
   b = years//100%10
   c = years//10%10
   d = years%10
   if(a!=b and a!=c and a!=d and b!=c and b!=d and c!=d):
      break 
print(years)
 	  	 			  	 		     		  		   		