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 = int(input())
i=y+1

while i<10000:
    count=[0]*10
    distincts=0
    newY=i
    
    while newY:
        count[newY%10]+=1
        newY=newY//10
    
    for j in count:
        if j==1:
            distincts+=1
    
    if distincts==4:
        newY=i
        print(newY)
        break
    
    i+=1