import java.util.*;
public class Test11 {
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    String line;
    line=sc.nextLine();
    String msg=line;
    line=sc.nextLine();
    String target=line;
    int msg_l=msg.length(),target_l=target.length(),targeted=0;
    for(int i=0;i<msg_l-target_l+1;i++){
      String tmp=msg.substring(i,i+target_l);
      if(tmp.equals(target)){
        if(1<target_l){
          targeted++;
          if(2<target_l){
            i+=target_l-2;
          }
        }else{
          targeted=-1;
          break;
        }
      }
    }
    System.out.println(targeted);
    sc.close();
  }
}