using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace InstructionSet
{
    class InstructionSet
    {
        static void Main()
        {
            string opCode = Console.ReadLine().ToLower();
            while (opCode != "end")
            {
                string[] codeArgs = opCode.Split(' ');
                long result = 0;
                //Console.WriteLine(codeArgs[0]);
                //Console.WriteLine(codeArgs[1]);
                //break;

                switch (codeArgs[0])
                {
                    case "inc":
                        {
                            int operandOne = int.Parse(codeArgs[1]);
                            result = operandOne + 1;
                            break;
                        }
                    case "dec":
                        {
                            int operandOne = int.Parse(codeArgs[1]);
                            result = operandOne - 1;
                            break;
                        }
                    case "add":
                        {
                            int operandOne = int.Parse(codeArgs[1]);
                            int operandTwo = int.Parse(codeArgs[2]);
                            result = (long)(operandOne + operandTwo);
                            break;
                        }
                    case "mla":
                        {
                            int operandOne = int.Parse(codeArgs[1]);
                            int operandTwo = int.Parse(codeArgs[2]);
                            result = ((long)operandOne * (long)operandTwo);
                            break;
                        }
                    default:
                        break;
                }

                Console.WriteLine(result);
                opCode = Console.ReadLine().ToLower();

            }
        }
    }
}