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.
The single line contains integer *y* (1000 ≤ *y* ≤ 9000) — the year number.
x=int(input())
x+=1

while True:
      n=0
      for i in str(x):
           
            if str(x).count(i)== 1:
                  n+=1
                 
            else:
                  continue
      if n == len(str(x)):
            print(x)
            break
      else:
            x+=1
            continue
