import java.io.*;
import java.util.*;

public class Main{
    public static BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
    public static PrintWriter stdOut = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
    public static void main(String[] args) throws IOException{
        int T = Integer.parseInt(stdIn.readLine());
        String inStr = null;
        long sum = 0;
        while(T-- > 0) {
            inStr = stdIn.readLine();
            int vNum = inStr.split("=").length - 1;
            if(inStr.indexOf("[]") == -1) { //属于第一种形式
                if(inStr.split(" ")[0].equals("int")) sum += 4L * vNum;
                else if(inStr.split(" ")[0].equals("long")) sum += 8L * vNum;
                else {
                    while(vNum-- > 0) {
                        int startIndex = inStr.indexOf("=");
                        int endIndex = inStr.indexOf(",");
                        if(endIndex == -1) endIndex = inStr.indexOf(";");
                        String subStr = inStr.substring(startIndex+1, endIndex);
                        if(!subStr.equals("")) sum += subStr.length() - 2L;
                        inStr = inStr.substring(endIndex + 1);
                    }
                }
            }else {//属于第二种形式
                int typeSize = 0;
                if(inStr.split("/[/]")[0].equals("int")) typeSize = 4;
                else typeSize = 8;
                while(vNum-- > 0) {
                    int startIndex = inStr.indexOf("[");
                    int endIndex = inStr.indexOf("]");
                    if(startIndex == endIndex - 1) {
                        vNum++;
                        inStr = inStr.substring(endIndex + 1);
                        continue;
                    }
                    sum += Integer.parseInt(inStr.substring(startIndex+1, endIndex)) * (long)typeSize;
                    inStr = inStr.substring(endIndex + 1);
                }
            }
        }
        int a = (int)(sum / 1073741824);
        int b = (int)(sum % 1073741824 / 1048576);
        int c = (int)(sum % 1073741824 % 1048576 / 1024);
        int d = (int)(sum % 1073741824 % 1048576 % 1024);
        if(a != 0) stdOut.print(a + "GB");
        if(b != 0) stdOut.print(b + "MB");
        if(c != 0) stdOut.print(c + "KB");
        if(d != 0) stdOut.print(d + "B");
        stdOut.println();
        stdOut.flush();
    }
}