int main() {
    int hh, mm, ss ;
    char t12[3];
    scanf("%d:%d:%d%s", &hh, &mm, &ss, t12) ;
        
    if (strcmp(t12,"PM")==0 && hh!=12) hh += 12 ;
    if (strcmp(t12,"AM")==0 && hh==12) hh = 0 ;
        
    printf("%02d:%02d:%02d", hh, mm, ss) ;
    return 0;
}

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <sstream>
#include <iomanip>
using namespace std;

int main(){
    int h, m, s;
    char ch, aorp;
    
    cin >> h >> ch >> m >> ch >> s >> aorp >> ch;
    h = (aorp == 'A') ? (h==12 ? 0 : h) : (h==12 ? 12 : h+12);
        
    cout << setw(2) << setfill('0') << h << ":" 
         << setw(2) << setfill('0') << m << ":" 
         << setw(2) << setfill('0') << s << endl;
    
    return 0;
}

time = input().strip()
h, m, s = map(int, time[:-2].split(':'))
p = time[-2:]
h = h % 12 + (p.upper() == 'PM') * 12
print(('%02d:%02d:%02d') % (h, m, s))

public static void main(String[] args) {
        
		Scanner scan = new Scanner(System.in);
        String time = scan.next();
        String tArr[] = time.split(":");
        String AmPm = tArr[2].substring(2,4);
        int hh,mm,ss;
        hh = Integer.parseInt(tArr[0]);
        mm = Integer.parseInt(tArr[1]);
        ss = Integer.parseInt(tArr[2].substring(0,2));
        
        String checkPM = "PM",checkAM ="AM";
        int h = hh;
        if(AmPm.equals(checkAM) && hh==12)
        	h=0;
        else if(AmPm.equals(checkPM)&& hh<12)
        	h+=12;
        
        System.out.printf("%02d:%02d:%02d",h,mm,ss);
    }