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
# cook your dish here

s=int(input())
f=1
for i in range(s+1,s+1000):
    a=i
    x=list(str(a))
    if(f==1):
        f=0
    else:
        print(i-1)
        break
    for j in range(0,3):
        for k in range(j+1,4):
            if(x[k]==x[j]):
                f=1
                break
        if(f==1):
            break
        
        
        