public static String timeConversion(String s) {
// Write your code here
String [] strArray = s.split(":");
String hour = strArray[0];
String answer = "";
Integer hourPM = Integer.parseInt(hour);
if (s.contains("AM")){
    if(hour.equalsIgnoreCase("12")){
        hour = "00";
    }  
    answer = hour +":"+ strArray[1] +":"+ strArray[2].substring(0,2);
}else if(s.contains("PM")){
    if (hourPM < 12){
        hourPM = hourPM + 12;
    }
    answer = hourPM +":"+ strArray[1] +":"+ strArray[2].substring(0,2);
}
return answer;
}