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.
a=int(input())
n=1
k=1
while(n):
    l=[]
    b=a+k
    for i in range(5):
        if b==0:
            n=0
            break
        if b%10 not in l:
            l.append(b%10)
            b=b//10
        else:
            k+=1
            break
print(a+k)