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=int(input())
a=x+1
for i in range(a,9999,1):
     d1=int(i/10)
     d2=int(d1/10)
     d3=int(d2/10)
     r1=i%10
     r2=d1%10
     r3=d2%10
     r4=d3%10

     if r1==r2 or r1==r3 or r1==r4 or r2==r3 or r3==r4 or r2==r4 :
         pass
     else:

      print(i)
      break
