// 读数据
var getInput = function () {
let inputArr = [],
groupCount = readline()
if (groupCount) {
for (let i = 0; i < parseInt(groupCount); i++) {
inputArr.push(readline())
}
}
return inputArr
}
// 排序
var sortAsc = function (arr) {
for (let i = 0; i < arr.length; i++) {
for (let j = i + 1; j < arr.length; j++) {
if (parseInt(arr[i]) > parseInt(arr[j])) {
let temp = arr[i]
arr[i] = arr[j]
arr[j] = temp
}
}
}
return arr
}
// 去重
var unique = function (arr) {
let newArr = [], count = 0
for (let i = 0; i < arr.length; i++) {
if (newArr.indexOf(arr[i]) === -1) {
newArr[count++] = arr[i]
}
}
return newArr
}
// 结果
var result = function () {
let inputArr
while ((inputArr = getInput()).length > 0) {
inputArr = unique(inputArr)
inputArr = sortAsc(inputArr)
console.log(inputArr.join('\n'))
}
}
result()