fun timeConversion(s: String): String {
    val splitString = s.split(":").toMutableList()
    val obtainFormat = splitString.last().takeLast(2)
     val hour = splitString.first().toInt()
    if(obtainFormat == "AM"){
        splitString[0] = String.format("%02d",hour.toInt() % 12)
    } else {
        splitString[0] = String.format("%02d",if(hour < 12) hour + 12 else hour)
    }
    return splitString.joinToString(":").dropLast(2)
}