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
#-------------------------------------------------------------------------------
# Name:        module1
# Purpose:
#
# Author:      lihua
#
# Created:     07/01/2017
# Copyright:   (c) lihua 2017
# Licence:     <your licence>
#-------------------------------------------------------------------------------

n=int(raw_input())

def dist(i):
    ss=set(list(str(i)))
    if len(ss)==4:
        return True
    else:
        return False

i=n+1
while dist(i)==False:
    i+=1
print str(i)