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


def dis(y) :
    
    temp = []
    
    for i in y :
        
        if i in temp :
            
            return 0 
            
        else :
            
            temp.append(i)
            
    return 1
    
y = int(input())

stry = str(y)




while(True) :
    
    new = y + 1 
    
    strn = str(new)
    
    if dis(strn) :
        
        print(new)
        
        break 
    
    else :
        
        y = y + 1


        
    

        
        
    
    
    
    
    
    
    
    
    
    
    
    
    
    