using System;
using System.Text.RegularExpressions;


namespace ConsoleApp1
{
    internal class Program
    {
        static void Main()
        {
            string operators = $@"\s*[-+/*]\s*";
            string num = @"([1-9]\d*|0)";
            string name = @"[a-z]\w*";
            string simpleOperation = $@"({num}|{name})({operators}({num}|{name}))+";
            string function = $@"{name}\s*\(\s*({num}|{name}|{simpleOperation})(\s*,\s*({num}|{name}|{simpleOperation}))*\s*\)";
            string arr = $@"{name}\[\s*({name}|{num}|{simpleOperation}|{function})\s*\]";
            string operation = $@"({num}|{name}|{arr})({operators}({num}|{name}|{arr}|{function}))+";
            string assign = $@"({name}|{arr})\s*=\s*({num}|{name}|{arr}|{operation}|{function})\s*;";
            //Console.WriteLine(assign);

            string input = Console.ReadLine();

            Regex reg = new Regex(assign);

            while (input != null)
            {
                MatchCollection matches = reg.Matches(input);

                for (int count = 0; count < matches.Count; count++)
                {
                    Console.WriteLine(matches[count].Value);
                }

                input = Console.ReadLine();
            }
        }
    }
}