#include <cmath>
#include <iostream>
#include <cstdio>
#include <algorithm>

using namespace std;

const int MAXN = 60 * 12;
const double EPS = 1e-9;

int Tn;
double ang[MAXN], required;
int hh[MAXN], mm[MAXN];

int main(int argc, const char * argv[]) {
    ios_base::sync_with_stdio(false);
    
    double hour_angle = 0.0;
    double minute_angle = 0.0;
    for(int i = 0; i < 60 * 12; i++) {
        if (i % 60 == 0)
            minute_angle = 0;
        else
            minute_angle += 360.0 / 60.0;
        hh[i] = i / 60;
        mm[i] = i % 60;
        ang[i] = fabs(minute_angle - hour_angle);
        if (ang[i] - EPS > 180.0)
            ang[i] = 360.0 - ang[i];
        hour_angle += 360.0 / (12.0 * 60.0);
    }
    
    double fault_tolerance = 1.0 / 120.0;
    
    scanf("%d", &Tn);
    while (Tn--) {
        scanf("%lf", &required);
        for(int i = 0; i < 60 * 12; i++)
            if (fabs(ang[i] - required) < fault_tolerance + EPS) printf("%.2d:%.2d\n", hh[i], mm[i]);
    }
    return 0;
}