code: function normalize(word) {
          var result = '';
          for (var i = 0; i < word.length; i++) {
              var kana = word[i];
              var target = transform[kana];
              if (target === false) {
                  continue;
              }
              if (target) {
                  kana = target;
              }
              result += kana;
          }
          return result;
      }
docs: Normalize words using the transform