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
n = int(raw_input())

def isDist(x):
    temp = []
    while x!= 0:
        rem = x % 10
        temp.append(rem)
        x = x / 10
    

    for i in range(len(temp)):
        t = temp[:i] + temp[i+1:]
        if temp[i] in t:
            return False
    return True
        

flag = False

n += 1

while flag == False:
    if isDist(n):
        flag = True
        break
    n += 1

print n