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
x=input()
w=0
while (True) :
      x=int(x)
      x=x+1
      for i in range(0,4):
            x=str(x)
            z=0
            z=x.count(x[i])
            if ( z > 1 ):
                  w=1
                  break
            else:
                  w=0
      if ( w == 1):
            continue
      else:
            break
print(x)
