>>286 #include <algorithm>
#include <iostream>
#include <list>
#include <string>
struct pred{
bool operator()(const std::string& x, const std::string& y)
{return x.length() < y.length();}
};
int main(){
std::list<std::string> li;
std::string line;
while (std::getline(std::cin, line))
if (!line.empty())
li.push_back(line.length() > 80 ? line.substr(0, 80) : line);
li.sort(pred());
for (std::list<std::string>::const_iterator first = li.begin(), last = li.end(); first != last; ++first)
std::cout << *first << std::endl;
}