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
n=int(input())
while 1:
    flag=0
    n+=1
    i=list(str(n))
    v1=-1
    while v1<3:
         v1 +=1
         v2=v1+1
         while v2<4:
            if i[v1]==i[v2]:
                flag=1
                break
                
            v2 +=1
            
         
         if flag==1:
             break
 
    if flag==0:
        break
    
print(n)
    
