char timeCase = s[8];
        string hourString = string.Concat(s[0],s[1]);
        int hour = int.Parse(hourString);
        
        if(timeCase == 'A')
        {
            if(hour == 12)
                hourString = "00";
        } else
        {
            if(hour != 12)
                hourString = (hour+12).ToString();
        }
        return string.Concat(hourString,s[2],s[3],s[4],s[5],s[6],s[7]);