class enam
{
    public static void main(String[] args)
    {
        String str1 = "Teknik Informatika Istitut Tekologi Sepuluh Nopember";
        System.out.println(str1.indexOf("Informatika"));
        System.out.println(str1.indexOf("Informatika",10));
        System.out.println(str1.lastIndexOf("Matematika"));
        System.out.println(str1.lastIndexOf("Matematika",10));
        System.out.println(str1.lastIndexOf("Matematika",20));
        System.out.println(str1.indexOf(97));
        System.out.println(str1.indexOf(97,7));
        System.out.println(str1.lastIndexOf(97));
        System.out.println(str1.lastIndexOf(97,7));
    }
}