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
s = int(input()) + 1
s = str(s)

for i in range(1000):
    s0 = int(s[0])
    s1 = int(s[1])
    s2 = int(s[2])
    s3 = int(s[3])
    #print({s0,s1,s2,s3})
    if len({s0,s1,s2,s3}) == 4:
        #print({s0,s1,s2,s3})
        print(s)
        break
    else:
        s = int(s) + 1
        s = str(s)
        #print((s,1))

