/* Topcoder TCO 2016, Round 1A 250-Pointer
   EllysTimeMachine
   James S. Plank
   Tue Aug 21 15:26:35 EDT 2018
 */

#include <string>
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

class EllysTimeMachine
{
    public:
        string getTime(string time);
};

string EllysTimeMachine::getTime(string time)
{
    int h, m;
    char buf[20];      // This really only needs to be 6 characters,
                       // but I'm using 20 to err on the high side.

    /* Convert the string into the two integers. */

    sscanf(time.c_str(), "%d:%d", &h, &m);

    /* Convert hours to minutes, and minutes to hours. */

    h %= 12;
    h *= 5;

    m /= 5;
    if (m == 0) m = 12;

    /* Create the return string using sprintf(). */

    sprintf(buf, "%02d:%02d", m, h);
    return buf;
}