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
import os
def readInts(): return map(str,raw_input().split())
n=readInts()[0]
n1=n
n1='.'.join(n1)
n1=n1.split(".")
temp=n
flag=True
c=1
while flag:
    temp=str(int(temp)+c)
    temp='.'.join(temp)
    temp=temp.split(".")
    test=list(set(temp))
    temp2=""
    for i in temp:
        temp2=temp2+i
    c=len(test)
    temp=temp2
    if c ==len(n):
        flag=False
        #temp=temp2
    if c>2:
        c=c//2
print temp
