#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vll = vector<ll>;
using vvll = vector<vll>;
using vvvll = vector<vvll>;
using vs = vector<string>;
using pll = pair<ll, ll>;
using vp = vector<pll>;
template<class T> using V = vector<T>;
template<class T> using VV = vector<vector<T> >;
#define rep(i, n) for(ll i = 0; i < (n); i++)
#define repb(i, n) for(ll i = (n)-1; i >= 0; i--)
#define repr(i, a, b) for(ll i = (a); i < (b); i++)
#define reprb(i, a, b) for(ll i = (b)-1; i >= (a); i--)
#define ALL(a) (a).begin(), (a).end()
#define SZ(x) ((ll)(x).size())
const ll MOD = 1000000007;
const ll INF = 100000000000000000LL;
const ld EPS = 1e-12L;
const ld PI = 3.1415926535897932385L;
inline ll GCD(ll a, ll b){ return b?GCD(b, a % b):a; }
inline ll LCM(ll a, ll b){ return a/GCD(a, b)*b; }
inline ll powint(ull x, ll y){ ll r=1; while(y){ if(y&1) r*=x; x*=x; y>>=1; } return r; }
inline ll powmod(ll x, ll y, ll m = MOD){ ll r=1; while(y){ if(y&1) r*=x; x*=x; r%=m; x%=m; y>>=1; } return r; }
template<class S, class T>inline bool chmax(S &a, const T &b){ if(a<b) { a=b; return 1; } return 0; }
template<class S, class T>inline bool chmin(S &a, const T &b){ if(b<a) { a=b; return 1; } return 0; }
#ifdef OJ_LOCAL
#include "dump.hpp"
#else
#define dump(...) ((void)0)
#endif

//https://github.com/beet-aizu/library/blob/master/string/knuth_morris_pratt.cpp
//BEGIN CUT HERE
// longest prefix suffix matching of [0, i)
vector<int> knuth_morris_pratt(const string &s){
  int n=s.size();
  vector<int> kmp(n+1,-1),mp(n+1,-1);
  for(int i=0,j=-1;i<n;i++){
    while(~j&&s[i]!=s[j]) j=kmp[j];
    kmp[i+1]=mp[i+1]=++j;
    if(i+1<n&&s[i+1]==s[j]) kmp[i+1]=kmp[j];
  }
  return mp;
}
// smallest d s.t. s[x] == s[x + d] for all x
vector<int> minimum_period(const string &s){
  auto mp=knuth_morris_pratt(s);
  for(int i=1;i<(int)mp.size();i++) mp[i]=i-mp[i];
  return mp;
}
// positions for t that match s
vector<int> pattern_match(string s,string t){
  int n=s.size(),m=t.size();
  vector<int> kmp=knuth_morris_pratt(s);

  vector<int> res;
  int i=0,j=0;
  while(i+j<m){
    if(s[j]==t[i+j]){
      if(++j!=n) continue;
      res.emplace_back(i);
    }
    i+=j-kmp[j];
    j=max(kmp[j],0);
  }
  return res;
}
//END CUT HERE

struct UnionFind{
    // par[i] parent. if i == par[i] i is root
    vector<ll> par;
    // sizes[i] sizeof tree i if i is root
    vector<ll> sizes;

    UnionFind(ll n): par(n), sizes(n, 1){
        // init: all node is root i
        rep(i, n) par[i] = i;
    }

    // find root of x
    ll find(ll x){
        if (x == par[x])
            return x;
        return par[x] = find(par[x]); // recursive, editing root
    }

    // merge x, y
    void unite(ll x, ll y){
        // root
        x = find(x);
        y = find(y);

        // do not merge if same tree
        if (x == y)
            return;

        // force size x > y
        if (sizes[x] < sizes[y])
            swap(x, y);

        // unite: x is parent of y
        par[y] = x;
        sizes[x] += sizes[y];
    }

    // x, y same root
    bool same(ll x, ll y){
        return find(x) == find(y);
    }

    // size of tree containing x
    ll size(ll x){
        return sizes[find(x)];
    }
};


int main(){
    string s;
    cin >> s;
    string t;
    cin >> t;
    ll ns = SZ(s), nt = SZ(t);
    string s2;
    while(SZ(s2) < ns+nt-1){
        s2 += s;
    }
    vi found = pattern_match(t, s2);
    dump(found);
    UnionFind uf(ns);
    for(auto&& e: found){
        if(e < ns){
            if(uf.same(e, (e+nt)%ns)){
                cout << -1 << endl;
                return 0;
            }
            uf.unite(e, (e+nt)%ns);
        }
    }
    dump(uf.sizes);
    cout << *max_element(ALL(uf.sizes))-1 << endl;
    return 0;
}

Measured memory_bytes: 15444