#include <iostream>


struct Connect{
    int a;
    int b;
    int weight;
};



int main(){
    int size_connect = 2;
    char a, b;
    int weight;
    int count  = 0;
    Connect *connect = new Connect [size_connect];


    while(std::cin){
       if(count == 0){
           std::cin >> a >> b;
           connect[count].a = (int)(a-97);
           connect[count].b = (int)(b-97);
       }
       else {
           std::cin >> a >> b >> weight;
           if(!std::cin)
               break;
           connect[count].a = (int)(a-97);
           connect[count].b = (int)(b-97);
           connect[count].weight = weight;

       }
       count++;
       if(count > size_connect){
           Connect copy[size_connect];
           for (int i = 0; i < size_connect; i++) {
               copy[i] = connect[i];
           }
           size_connect = size_connect*2;
           delete []connect;
           connect = new Connect [size_connect];
           for (int i = 0; i < count - 1; i++) {
               connect[i] = copy[i];
           }
       }

    }

    delete [] connect;



    return 0;
}