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  copy
x=int(input())
y = copy.deepcopy( x )


# dict={}

while(x<=9012):
    # print( x )
    val = []
    p = copy.deepcopy( x )

    while (p > 0):
        temp = p % 10
        val.append( temp )
        p = p // 10
    count = 0
    temp1 = 0
    for value in val:
        temp1=temp1+(10**count)*int(value)
        count+=1
# print(temp)
#     print(len(set(val)))
#     print("temp1 {}".format(temp1))
    if len(set(val))>=4 and temp1>y:
        print(temp1)
        break

    x+=1

# print(val)
