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
inp = int(raw_input())

def func(x):
       x=str(x)
       #print(x)
       for i in range(4):
              
             # print(i)
              
              for j in range(i+1,4):
                     
                    # print(j)
                     if x[i]==x[j]:
                            return 0
                            break
       return 1 


while True:

       inp+=1
       if func(inp):
              print inp
              
              break
