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
year = str(int(input())+1)
mar = True
while mar :
 if year[0]!=year[1] and year[0]!= year[2] and year[0] != year[3] \
         and year[1]!=year[0] and year[1]!= year[2] and year[1] != year[3] and\
         year[2]!=year[1] and year[2]!= year[0] and year[0] != year[3] and year[3]!=year[1]\
         and year[3]!= year[2] and year[3] != year[0]:
                   print(year)
                   mar = False

 else :
        year =str(int(year)+1)

 	 			 		      	   	       	 		