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
def ras(y):
    y=y+1
    while(True):
        y=str(y)
        for i in range(len(y)):
            x=y[i+1:]
            if(y[i] in x):
                break
                
            
            else:
                if(i==len(y)-1):
                    return(y)
        y=int(y)        
        y=y+1        
    return(y)
y=int(input())
r=ras(y)
print(r)