#include<bits/stdc++.h>
using namespace std;
int main(){  //C++14级 字符串移位
	string s1,s2;
	cin>>s1>>s2;
	int len=s1.length();
	int len2=s2.length();
	for(int i=0;i<len;i++){
		s1.insert(len,s1.substr(0,1));
		s1.erase(0,1);
		string s3=s1;
		s3.erase(len2,len-len2);
//		cout<<s1<<"\n";
//		cout<<s3<<endl;
		if(s2==s3){
			cout<<i;
			return 0;
		}		
	}
	cout<<-1;
	return 0;
}

#include<iostream>
using namespace std;
int main(){ //字符串移位 C++14级
	string s1,s2;
	cin>>s1>>s2;
	for(int i=0;i<s1.length();i++){
		s1+=s1[0];
		s1.erase(0,1);
		if(s1.find(s2)<s1.length()){
			cout<<i+1;
			return 0;
		}
	}
	cout<<-1;
	return 0;
}