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
t = int(input())
g = []
for i in range(1000, 9100):
    k=10
    flag =0
    d=[0,0,0,0]
    m = i
    for j in range(4):
        d[j] = m%k
        m = m//10
    d.sort()
    for j in range(1,4):
        if d[j]==d[j-1]:
            flag=1
            break
    if flag==0:
        g.append(i)
i=0
while(True):
    if g[i]>t:
        print(g[i])
        break 
    i+=1
