using System; using System.Collections; using System.Collections.Generic; using System.Diagnostics; using System.IO; using System.Linq; using System.Numerics; using System.Text; using System.Text.RegularExpressions; using System.Threading.Tasks; using static System.Math; public static class P { public static void Main() { var s = Console.ReadLine(); var t = Console.ReadLine(); if (t.Length == 1 && s.Contains(t)) { Console.WriteLine(-1); return; } var res = ""; foreach (var item in s) { if ((res + item).EndsWith(t)) res += '.'; res += item; } Console.WriteLine(res.Length - s.Length); } }