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.
def hasDistinct(year):
    year_str = str(year)
    year_set = set()
    
    for i in year_str:
        if i in year_set:
            return False
        year_set.add(i)
        
    return True
    
y = int(input())    
y += 1

while True:
    if hasDistinct(y):
        print(y)
    y += 1
