import java.io.BufferedReader
import java.io.InputStream
import java.io.InputStreamReader
import java.lang.StringBuilder
import java.util.*

fun main(args: Array<String>) {
    val sc = FastScanner(System.`in`)
    val s = sc.nextLine().toMutableList()
    val t = sc.nextLine()
    val n = s.count()
    val m = t.length
    var count = 0
    for (i in 0 until n - m + 1) {
        var same = true
        for (j in 0 until m) {
            if (s[i + j] != t[j]) {
                same = false
                break
            }
        }
        if (same) {
            if (m == 1) {
                println(-1)
                return
            }
            s[i + m - 2] = '.'
            count++
        }
    }
    println(count)
}

class FastScanner(s: InputStream) {
    private var st = StringTokenizer("")
    private val br = BufferedReader(InputStreamReader(s))

    fun next(): String {
        while (!st.hasMoreTokens()) st = StringTokenizer(br.readLine())

        return st.nextToken()
    }

    fun nextInt() = next().toInt()
    fun nextLong() = next().toLong()
    fun nextLine() = br.readLine()
    fun nextDouble() = next().toDouble()
    fun ready() = br.ready()
}