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.
a=int(input())
x=99999999999999
for i in range(a+1,10000):
    s=i%10
    v=i//1000
    d=i%1000
    f=d//100
    w=d%100
    e=w//10
    if s!=v and s!=f and s!=e and v!=f and v!=e and f!=e:
        x=min(x,i)
print(x)
