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
inttahun = int(input())+1
strtahun = str(inttahun)
jadi = False
while (jadi != True):
    if strtahun[-1] in strtahun[:-1]:
        inttahun += 1
        strtahun = str(inttahun)
    elif strtahun[-2] in strtahun[:-2]:
        inttahun = (inttahun//10 + 1) *10
        strtahun = str(inttahun)
    elif strtahun[-3] in strtahun[:-3]:
        inttahun = (inttahun//100 + 1) *100
        strtahun = str(inttahun)
    elif strtahun[-4] in strtahun[:-4]:
        inttahun = (inttahun//1000 + 1) *1000
        strtahun = str(inttahun)
    else:
        jadi = True
print (inttahun)
