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
s=0
x=str(input())
while 1:
    a=''.join(x)
    x=int(a)
    
    x=x+1
   # print('x=',x)
    x=str(x)
    x=list(x)
  #  print('xxxxxxxxxxxx=',x)
    for i in x:
        if x.count(i)==1:
          #  print('i=',i)
            s+=1
    if s==len(x):
        
        print(''.join(x))
        break
    s=0