text: function building(input) {
      let floors = Number(input.shift());
      let rooms = Number(input.shift());
  
      for (let f = floors; f >= 1; f--) {
          let output = "";
          for (let r = 0; r < rooms; r++) {
              if (f == floors) {
                  output += `L${f}${r} `;
              } else if (f % 2 != 0) {
                  output += `A${f}${r} `;
              } else {
                  output += `O${f}${r} `;
              }
          }
          console.log(output);
      }
  }
  
  building([6, 4])