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
y1=int(input())
j=k=0
c=1
a=[0,0,0,0]
while(c!=0):
    i=0
    y1=y1+1
    y=y1
    while(y>0 and y<10000):
        d=y%10
        a[i]=d
        i+=1
        y//=10
    c=0
    for i in range(1,4):
        for j in range(0,i):
            if(a[i]==a[j]):
                c+=1
                break
        if(c>0):
            break
for t in range(3,-1,-1):
    print(a[t],end="")