#include <iostream>
using namespace std;

void output(int h, double m, double s)
{
	int im = (int)(m);
	int is = (int)(s+0.5);
	cout << h << ":";
	if (im < 10)
		cout << '0';
	cout << im << ":";
	if (is < 10)
		cout << '0';
	cout << is << endl;
}

int main()
{
	int ncases;
	cin >> ncases;
	for(int icase=1; icase<=ncases; icase++) {
		cout << "Case " << icase << ": ";
		int h, ang;
		string s;
		cin >> ang >> s >> h;
		int hang = (12-h)*30;			// convert hour to angle of hands;
		int target = ang - hang;
		if (s == "after") {
			if (target <= 0)
				target += 360;
			double mins = target*(2.0/11.0);
			if (mins >= 60.0) {
				h++;
				if (h > 12)
					h -= 12;
				mins -= 60.0;
			}
			double secs = (mins - (int)mins)*60.0;
			output(h, mins, secs);
		}
		else {
			h--;
			if (target >= 0)
				target -= 360;
			double mins = target*(2.0/11.0);
			if (mins <= -60.0) {
				h--;
				mins += 60.0;
			}
			if (h < 1)
				h += 12;
			if (mins == 0.0) {
				h++;
				if (h > 12)
					h -= 12;
			}
			else
				mins = 60.0 + mins;
			double secs = (mins - (int)mins)*60.0;
			output(h, mins, secs);
		}
	}
}