#include <iostream>
#include <vector>
#include <string>
#include <sstream>
using namespace std;

class directory{
    vector<string> files;
    int N;
    public:
    directory() {}
    ~directory() {}
    void add_file(string f) {
        files.push_back(f);
    }
    void copy_file(string name,int n=1) {
        // check exist
        bool flag = false;
        for(string j : files) {
            if (name == j) flag = true;
        }
        if (!flag) {
            cout<<"error"<<endl;
            return;
        }

        string back = name;
        int index = name.rfind('.',name.size());
        if(index == -1) {
            for(int i = 1;i <= n;i++){
                back = name;
                back.append('_' + to_string(i));
                bool flag = false;
                for(string j : files) {
                    if (back == j) flag = true;
                }
                if (flag) {
                    n++;
                    continue;
                }
                cout<<back<<' ';
                add_file(back);
            }
        } else {
            for(int i = 1;i <= n;i++){
                back = name;
                back.replace(index,1,'_' + to_string(i) + '.');
                bool flag = false;
                for(string j : files) {
                    if (back == j) flag = true;
                }
                if (flag) {
                    n++;
                    continue;
                }
                cout<<back<<' ';
                add_file(back);
            }
        }

    }
};

int main() {
    directory dir;
    for(int i=0;i<2;i++){
        string temp,cmd;
        vector<string> part;
        getline(cin,cmd);
        stringstream ss(cmd);
        while (ss>>temp) {
            part.push_back(temp);
        }
        if (part[0] == "copy" && part.size() == 3) {
            dir.copy_file(part[1],stoi(part[2]));
            cout<<endl;
        }
        else if(part[0] == "copy") {
            dir.copy_file(part[1],1);
            cout<<endl;
        }
        else {
            for(string j: part) {
                dir.add_file(j);
            }
        }
    }
    system("pause");
    return 0;
}