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 bf(s):

    l=list(s)

    l=l+['a']
    l=sorted(l)
    
    for i in range(len(l)-1):
        if(l[i]==l[i+1]):
            
            return(1)


ss=input()
i=1
while(1==1):
    x=str(int(ss)+i)
    if(bf(x)!=1):
        break
    i=i+1
print(x)
        
    
    
    
    
       
    
