#include<bits/stdc++.h> using namespace std; int main(){
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<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;
}