Method main

Lecture 36 - Recursion 9/src/Main.java:16–21

(String[] args)

    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        String[] keypad = {"", "", "abc", "def", "ghi", "jkl", "mno", "pqr", "stuv", "wxyz"};
        combination(s, keypad, "");
    }
}