#include <cstdio>
#include <iostream>
#include <string>
using namespace std;
int num,l;
string save,read,classmate[35];
bool bo;
void (string s){
classmate[++num]=s;
}
void print(){
printf("%d\n",num);
for (int i=1;i<=num;i++) cout<<classmaste[i]<<endl;
}
int main{
printf("报名请输入 add(名字)\n");
printf("查看名单请输入 print()\n");
while (cin>>read){
read=' '+read;
if (read[1]=='p') print();
else{
save="";
l=read.size;
for (int i=1;i<=l;i++){
if (read[i]=='(') bo=true;
if (read[i]==')') bo=false;
if (bo) save+=read[i];
}
add(save);
}
}
}