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
year=[]
prin=int(input())+1
prin=str(prin)
while(True):
    year=list(prin)
    year.sort()
    i=0
    flag=0
    for i in range(len(year)-1):
        if(year[i]==year[i+1]):
            flag+=1
            break
        
    if(flag==1):
        prin=int(prin)+1
        prin=str(prin)
    else:
        break
print(int(prin))




