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 = raw_input();

def isNext(y):
    if len(y) == 1: return True;
    if y[0] in y[1:len(y)]: return False;
    else: return isNext(y[1:len(y)]);

for i in range(int(year)+1,9013):
    if isNext(str(i)):
        print i;
        break;