import java.io.IOException;

class Jiafa {

    public static void main(String[] args)

    {
        try {
            withExcept();
        }
        catch (IOException e) {
            System.out.println(e);
        }
        catch (NumberFormatException e) {
            System.out.println(e + "in Jiafa.main(.) ");
        }
    }

    static void withExcept() throws IOException, NumberFormatException {
        byte[] bs = new byte[10];
        int[] i = new int[2];
        for (int j = 0; j < 2; j++) {
            int len = System.in.read(bs) - 2;
            String s = new String(bs, 0, len);
            try {
                i[j] = Integer.parseInt(s);
                System.out.println(j + ":" + i[j]);
            }
            catch (NumberFormatException e) {
                System.out.println(e + "in withExcept()");
                throw e;
            }
        }

        {
            System.out.println(i[0] + i[1]);
        }
    }
}