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.
The single line contains integer *y* (1000 ≤ *y* ≤ 9000) — the year number.
y = int(input())  # Read the given year

# Start iterating from the year following the given year
while True:
    y += 1  # Increment the year
    year_str = str(y)  # Convert the year to a string
    if len(set(year_str)) == 4:
        # Check if all its digits are distinct (4 unique digits)
        break

# Print the result
print(y)#kkhh
 	   							 			 		  			 		