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.
i = int(input())

while True:
    i+=1
    dat = set()
    for char in str(i):
        dat.add(char)
    
    print(dat)
    
    if len(str(i)) == len(dat):
        print(i)
        break
        
    