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 = int(raw_input())
num = year + 1

achou = False

while (not achou):
    string = str(num)
    dicio = {numero: 0 for numero in "0123456789"}
    repete = False
    i = 0

    while (not repete and i < 4):
        if (dicio[string[i]] == 0):
            dicio[string[i]] = 1
        else:
            repete = True
        
        i += 1
    
    if (repete):
        num += 1
    else:
        achou = True

print string