def f():
    S=input()
    T=input()
    n=len(T)
    if n<2:
        if S.find(T)<0: return 0
        return -1
    k=0
    for i in range(1000):
        k= S.find(T,k)
        if k<0:   return i
        k+=n-1
    return i
print(f())