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
x=int(input())
if x>=1000 and x<=9000:
    x=x+1
    while(x):
        n=x
        l=[]
        while(n>0):
            y=n%10
            l.append(y)
            n=n//10
        ln=len(l)
        s=set(l)
        sn=len(s)
        if ln==sn:
            print(x)
            break
        else:
            x=x+1
    
    
        
        
            
        
    
    
        
        
        
        
    
        
        
        
        
        
        
