#include <string>
#include <vector>
#include <list>
#include <cmath>
#include <algorithm>
#include <map>
#include <set>
#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];

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

  h %= 12;
  h *= 5;

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

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