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
y=input()

x=int(y)
z=x+1

i=0
for i in range(9001):
    a=int(z/1000)
    b=int(((z%1000)-(z%100))/100)
    c=int(((z%100)-(z%10))/10)
    d=int(z%10)
    if(a==b or a==c or a==d or b==c or b==d or c==d):
        z+=1
        continue
    else:
        break
print(z)
