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
y = int(input())
for i in range(y+1,9999):
    x = str(i)
    ax = []
    for j in range(len(x)):
        ax += [x[j]]
    ax.sort()
    xis = [ax[0]]
    for k in range(len(ax)-1):
        for l in range(k,len(xis)):
            if xis[l] != ax[k+1]:
                xis += [ax[k+1]]
    if len(xis) == 4:
        break
print(x)

        
    
