function solve(n) {


  let arr = [1, 'one', 2, 'two', 3, 'three', 4, 'four', 5, 'five', 6, 'six', 7, 'seven', 8, 'eight', 9, 'nine'];

  let inputNum = String(n);


for (let i = 0; i < arr.length; i++) {

  if (Number(inputNum[inputNum.length - 1]) === arr[i]) {

    console.log(arr[i + 1]);

  }

}





}