package main

import . "fmt"
import . "strings"

func main() {
	var s, t string
	Scan(&s, &t)
	
	if len(s) < len(t) {
		Println(0)
		return
	}
	
	if len(t) == 1 {
		if Contains(s, t) {
			Println(-1)
		} else {
			Println(0)
		}
		return
	}
	
	var ans int
	for {
		i := Index(s, t)
		if i < 0 {
			break
		}
		ans++
		s = s[i+len(t)-1:]
	}
	
	Println(ans)
}