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
s = input()
s = str(int(s) +1)

q = int(s)


while len(set(s)) != 4 :
    q += 1
    s = str(q)


print (s)
    



    



        
        
        
        


            



        
            

    


    

    



        


        



    
        
        








    
    
 

    

        
    
            
    




    


        



    





        
            
        
    
