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.
n=(input())

n=str(int(n)+1)
l=list(n)
s=set(l)
while(len(s)!=len(l)):
    l=list(str(int(n)+1))
    s=set(l)
    print(s,l)
print(''.join(l))