include [HTML_REMOVED]
using namespace std;
int get_seconds(int h, int m, int s)
{
return h * 3600 + m * 60 + s;
}
int get_time()
{
string line;
getline(cin, line);
if(line.back() != ‘)’) line += ” (+0)”;
int h1, m1, s1, h2, m2, s2, d;
sscanf(line.c_str(), "%d:%d:%d %d:%d:%d (+%d)", &h1, &m1, &s1, &h2, &m2, &s2, &d);
return get_seconds(h2, m2, s2) - get_seconds(h1, m1, s1) + d * 24 * 3600;
}
int main()
{
int T;
cin >> T;
while (T – )
{
int time = get_time() + get_time() >> 1;
int hour = time / 3600;
int minute = time % 3600 / 60;
int second = time % 60;
printf("%02d:%02d:%02d\n", hour, minute, second);
}
return 0;
}