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.

Input

The single line contains integer y (1000 ≤ y ≤ 9000) — the year number.

Output

Print a single integer — the minimum year number that is strictly larger than y and all it's digits are distinct. It is guaranteed that the answer exists.

Examples

Input

1987


Output

2013


Input

2013


Output

2014
#Красивый год
a=int(input())#первый красивый год
s=a+1
d=s%10#последняя
f=s//10%10#тертья
g=s//100%10#вторая
h=s//1000#первая
while (d==f)or(d==g)or(d==h)or(f==g)or(f==h)or(g==h):
    s=s+1
    d=s%10#последняя
    f=s//10%10#тертья
    g=s//100%10#вторая
    h=s//1000#первая
print(s)
