#include <bits/stdc++.h>
#define For(i, a, b) for(int (i)=(int)(a); (i)<(int)(b); ++(i))
#define rFor(i, a, b) for(int (i)=(int)(a)-1; (i)>=(int)(b); --(i))
#define rep(i, n) For((i), 0, (n))
#define rrep(i, n) rFor((i), (n), 0)
#define fi first
#define se second
using namespace std;
typedef long long lint;
typedef unsigned long long ulint;
typedef pair<int, int> pii;
typedef pair<lint, lint> pll;
template<class T> bool chmax(T &a, const T &b){if(a<b){a=b; return true;} return false;}
template<class T> bool chmin(T &a, const T &b){if(a>b){a=b; return true;} return false;}
template<class T> T div_floor(T a, T b){
    if(b < 0) a *= -1, b *= -1;
    return a>=0 ? a/b : (a+1)/b-1;
}
template<class T> T div_ceil(T a, T b){
    if(b < 0) a *= -1, b *= -1;
    return a>0 ? (a-1)/b+1 : a/b;
}

constexpr lint mod = 1e9+7;
constexpr lint INF = mod * mod;
constexpr int MAX = 100010;

vector<int> Z_algorithm(string &s){
    int n = s.size();
    vector<int> z(n);
    z[0] = n;
    int i = 1, j = 0;
    while(i < n){
        while(i+j < n && s[j] == s[i+j]) ++j;
        z[i] = j;
        if(j == 0){
            ++i;
            continue;
        }
        int k = 1;
        while(i+k < n && k+z[k] < j) z[i+k] = z[k], ++k;
        i += k; j -= k;
    }
    return z;
}

int main(){
    string s, t;
    cin >> s >> t;
    if(t.size() == 1){
        rep(i, s.size())if(s[i] == t[0]){
            puts("-1");
            return 0;
        }
        printf("%d\n", 0);
    }
    else{
        int n = s.size(), m = t.size();
        t += s;
        auto z = Z_algorithm(t);
        int i = m, ans = 0;
        while(i < n+m){
            if(z[i] >= m) ++ans, i += m-1;
            else ++i;
        }
        printf("%d\n", ans);
    }
}