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.
x = input()
count = 0
count1 = 0
for i in range(len(x)):
    if x == '2013':
        count = count + 1
    elif x[i] != x[-1]:
        count1 = count1 + 1
if count1 > count:
    print(2013)
else:
    print(2014)