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=int(input())
while(True):
    n+=1 
    s=str(n)
    l=[]
    '''for i in s:
        l.append(i)'''
    sett=set(s)
    if(len(sett)>=len(s)):
        print(s)
        break
    