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.
year=int(input("enter year"))
x=year
while year<x+100:
    temp=year+1
    a=int(temp%10)
    b=(int((temp/10))%10)
    c=(int(temp/100))%10
    d=int(temp/1000)
    if (a!=b and b!=c and c!=d and d!=a and a!=c and b!=d):
        print(temp)
        break 
    year+=1