#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
void append(char**stack, int top, char* action)
{
    for (int i=0; i<25; i++)
    {
        stack[top][i]=action[i];
    }



}
int convert(char* string,int n)
{
    n--;
    int num = 0;
    int modifier = 1;
    while (n>=0)
    {
        int a = string[n]-'0';

        a *= modifier;
        modifier *= 10;
        num += a;
        n--;
    }
    return num;
}
void fremove(char**stack, char* action,int beg)
{

    char time_1[5];
    int i=0;
    //printf("%s",stack[0]);
    while (stack[beg][i+2]!=' '&& i<5)
    {

        time_1[i]=stack[beg][i+2];
        i++;
    }

    int t_1=convert(time_1,i);


    char number[15];
    for (int i=0; i<15; i++)
        number[i]=' ';

    i++;
    int j=0;
    while (stack[beg][i+2]!=' '&& i+2<25)
    {
        number[j]=stack[beg][i+2];
        i++;
        j++;
    }


    char time_2[5];
    i=0;
    while (isdigit(action[i+2])&&i<5&& i+2<strlen(action))
    {
        time_2[i]=action[i+2];
        i++;
    }
    int t_2=convert(time_2,i);
    i=0;

    int c=t_2-t_1;
    printf("%s %d",number,c);




}
void print(char ** stack, int top)
{
    printf("\n");
    for (int i=0; i<top; i++)
    {
        printf(" %s ",stack[i]);
    }
}
int main()
{
    int n;
    scanf("%d",&n);
    char action[25];
    char temp;
    char * data=malloc(sizeof(char)*26*n);
    char ** stack=malloc(n*sizeof(char*));
    int top=0;
    int beg=0;

    for (int i=0; i<n ; i++)
    {
        stack[i]=data+i*25;
    }

    for (int i=0; i<n; i++)
    {

        scanf("%c",&temp);
        scanf("%[^\n]",action);

        if (action[0]=='a')
        {

            append(stack,top,action);
            top++;


        }
        else if (action[0]=='r')
        {


            fremove(stack,action,beg);
            beg++;

        }
    }


    free(data);
    free(stack);

}