function myin(){return require("fs").readFileSync("/dev/stdin", "utf8").trim();}
function myout(t){console.log(t);}//standard output
function myerr(t){console.error(t);}//standard error
//[no]param
//0:何もしない  1:数値へ変換  2:半角SPで分割  3:改行で分割  4:半角SPで分割し、数値配列へ
//5:改行で分割し、数値配列へ  6:1文字に分割  7:1文字に分割し、数値配列へ
function myconv(i,no){switch(no){case 0:return i;case 1:return parseInt(i);case 2:return i.split(" ");case 3:return i.split("\n");case 4:return i.split(" ").map((a)=>Number(a));case 5:return i.split("\n").map((a)=>Number(a));case 6:return i.split("");case 7:return i.split("").map((a)=>Number(a));}}

function Main(input) {
  input = myconv(input,4);
  var A = input[0];
  var B = input[1];
  var K = input[2];
  var alist = [];
  var blist = [];
  for(var i = A; i < A+K; i++){
    if(i > B){break;}
    alist.push(i);
  }
  for(var i = B; i > B-K; i--){
    if(i < A){break;}
    blist.push(i);
  }
  blist.sort(function(a,b){return a-b;});
  alist = alist.concat(blist);
  alist = Array.from(new Set(alist));
  myout(alist.join("\n"));
}

Main(myin());
