def z_algo(s):
    n=len(s)
    A=[0]*n
    j=c=0
    for i in range(1,n):
        if i+A[i-c]<c+A[c]:
            A[i]=A[i-c]
        else:
            j=max(0,c+A[c]-i)
            while i+j<n and s[j]==s[i+j]: j+=1
            A[i]=j
            c=i
    A[0]=n
    return A

s,t=input(),input()
i=1;num=len(t);ans=0
check=z_algo(t+s)
if t not in s: print(0);exit()
if len(s)==1 or len(t)==1: print(-1);exit()
while i<len(s+t):
    if check[i]==num:
        ans+=1
        i+=num
    elif check[i]>num:
        ans+=1
        i+=check[i]
    else:
        i+=1
print(ans)