trie_structure.js

this.trie = {
  isLeaf: false,
  children: {
     'a': {
        isLeaf: false,
        children: {
          'n': {
              isLeaf: false,
              children: {
                't': {
                    isLeaf: true,
                    children: {}
                },
                'd': {
                    isLeaf: true,
                    children: {}
                }
              }
           }
        }
     }
  }
}