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
def difNum(j):
    dif = 1
    lista = list(str(j))
    tam = len(lista)
    for l in range(0,tam-1,1):
      for p in range(l+1,tam,1):
          if lista[l] == lista[p]:
              dif = 0
    return dif
        


i = int(input())

diferente = 0
while (diferente==0):
    i+=1
    diferente = difNum(i)
print(i)