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(""))
def YaEsta(X,N):
    Ayuda=-1
    for K in range(len(N)):
        if N[K]==X:
            Ayuda=1
    return Ayuda
def Descomponer(N):
    NA=[]
    while(N>0):
        Ud=N%10
        X=YaEsta(Ud,NA)
        if(X==-1):
            NA=NA+[Ud]
            N=N//10
        else:
            break
    if(len(NA)==4):
        return 1
    else:
        return 0
K=N+1
while(K<9013):
    X=Descomponer(K)
    if X==1:
        print(K)
        break
    else:
        K=K+1