function timeFifth(input){
    let houer = Number(input[0]);
    let minutes = Number(input[1]);


  let houerToMin = houer *60;
  let totalMin = houerToMin + minutes +15;

  let newHouerConv = Math.floor(totalMin /60);
  let newMinCon = totalMin % 60

  if (newHouerConv === 24){
    console.log(`0:${newMinCon}`)
  }
  else if (newMinCon < 10 ){
    console.log(`${newHouerConv}:0${newMinCon}`)
}


  else  {
    console.log(`${newHouerConv}:${newMinCon}`)
  }



}

timeFifth(["23", "45"])