#include <iostream>
//#include <fstream>
#include <string>
#include <sstream>

int main() {
    //std::ifstream F("file.txt");
    std::istream &F = std::cin;

    int numberofTasks, currentTask, currentConstraint;

    F >> numberofTasks;
    F.ignore();
    
    std::cout << "Constraints :" << std::endl;
    for (int t = 1; t <= numberofTasks; ++t) 
    {
        std::string line;
        if (!std::getline(F, line)) break;
        
        std::istringstream iss(line);

        iss >> currentTask;
        std::cout << currentTask << "\t";

        while ((iss >> currentConstraint) && (currentConstraint != 0))
        {
            std::cout << currentConstraint << " ";
        }

        std::cout << std::endl;
    }
    return 0;
}