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.
from collections import Counter
n=input()
t=True
n1=int(n)
while(t==True):
    n1=n1+1
    n2=str(n1)
    q=len(Counter(n2))
 
    if len(str(n))==q:
        t=False
        print(n1)