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
n=int(input())
n+=1
k=n
while(True):
    
    a=[0 for i in range(4)]
    i=0
    kk=1
    #print(a)
    while(k):
        rem=k%10
        a[i]=rem
        i+=1
        k=k//10
    #print(a)
    for i in range(4):
        for j in range(i+1,4):
            if a[i]==a[j]:
                kk=0
                break
        if kk==0:
            break
    if kk==0: 
        n+=1
        k=n
        continue
        
    else: 
        print(n)
        break
        
    
    