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 func1(y):
    y = str(y)
    i = 0
    while i < 3:
        j = i + 1
        while j < 4:
            if y[i] == y[j]:
                return True
            j += 1
        i += 1    
    return False            
y = int(input())
i = 0
while True:
    y += 1
    if func1(y) == False:
        break;
    y = int(y)
print(y)    
    

