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
# A. Beautiful Year
# time limit per test2 seconds
# memory limit per test256 megabytes
# inputstandard input
# outputstandard output
# 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
# inputCopy
# 1987
# outputCopy
# 2013
# inputCopy
# 2013
# outputCopy
# 2014

#Check year is beatiful
def isBeautifulYear(n):
    return len(set([i for i in str(n)]))==len(str(n))

n = int(input())
n +=1
while not isBeautifulYear(n):
    n+=1
print(n)