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

t1=int(input())
s1=str(t1)
s1=set(list(s1))
t2=t1+1
while t2 < 10000:
    s2=str(t2)
    s2=set(list(s2))
    if len(s2)==4:
        print(t2)
        break
    
    t2=t2+1    
    
    
        
        
        

    
