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.

def func(n):
  h = []
  for i in n:
    if(i in h):
      return True
    h.append(i)
  return False

a = str(input('Введите число: '))

res = str(int(a)+1)
while func(res):
  res = str(int(res)+1)
print(res)