"use strict";
function I(s,f){this._s=s.split("\n");this._c=0;this._l=0;this._f=f||Number}I.prototype.a=function(){var l=this._s[this._l];if(!l)return;var t=l.trim().split(" ");var a=t[this._c];this._c++;if(t.length===this._c){this._c=0;this._l++}return this._f(a)};I.prototype.l=function(){var l=this._s[this._l];if(!l)return;this._c=0;this._l++;return l.split(" ").map(this._f)};module.exports=I;

function main(input) {
  const o = new I(input);

  const N = o.a();
  const T = o.a();

  let c = [];
  let t = [];
  for (let i=0;i<N;i++) {
    c.push(o.a()); 
    t.push(o.a()); 
  }

  let min = Infinity;
  for (let i=0;i<N;i++) {
    if (t[i] <= T && c[i] < min) {
      min = c[i];
    }
  }

  if (!Number.isFinite(min)) {
    console.log("TLE");
  } else {
    console.log(min);
  }
}


main(require("fs").readFileSync("/dev/stdin", "utf8"));
