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.

c=int(input())
while True:
    c+=1
    a=(c)%10
    b=(c//10)%10
    e=(c//100)%10
    r=(c//1000)%10   
    res=set()
    res.add(a)
    res.add(b)
    res.add(e)
    res.add(r)
    if(len(res)==4):
        break        
print(c)




