def ldec(n):
    return "{:02d}".format(n)
    
def timeConversion(s):
    ampm = s[-2:]
    time = s[:-2].split(":")
    hours = int(time.pop(0))
    minutes = int(time.pop(0))
    seconds = int(time.pop(0))
    if (ampm == "PM" and hours != 12) or (ampm == "AM" and hours == 12):
        hours += 12
    return f"{ldec(hours%24)}:{ldec(minutes)}:{ldec(seconds)}"