#include <iostream>
#include <map>
#include <string>

int main() {
	std::map<int,std::string> m = {
		{1,"1"},
		{2,"2"},
		{3,"3"},
		{4,"4"},
		{5,"5"},
		{6,"6"},
		{7,"7"},
		{8,"8"},
	};
	int i = 0;
	for(auto it = --m.end();it != m.begin();--it,++i){
		if(i>4){break;}
		std::cout << it->first << ':' << it->second <<std::endl;
	}
	
	return 0;
}