class Trie {

private boolean isWord;

private Trie[] next;

/** Initialize your data structure here. */

public Trie() {

isWord=false;

next=new Trie[26];

}

/** Inserts a word into the trie. */

public void insert(String word) {

Trie node=this;

char []temp=word.toCharArray();

for(char c:temp){

if(node.next[c-'a']==null){

node.next[c-'a']=new Trie();

}

node=node.next[c-'a'];

}

node.isWord=true;

return;

}

/** Returns if the word is in the trie. */

public boolean search(String word) {

Trie node=this;

char[] temp=word.toCharArray();

for(char c:temp){

if(node.next[c-'a']==null){

return false;

}

node=node.next[c-'a'];

}

return node.isWord;

}

/** Returns if there is any word in the trie that starts with the given prefix. */

public boolean startsWith(String prefix) {

Trie node=this;

char[] temp=prefix.toCharArray();

for(char c:temp){

if(node.next[c-'a']==null){

return false;

}

node=node.next[c-'a'];

}

return node!=null;

}

}

/**

* Your Trie object will be instantiated and called as such:

* Trie obj = new Trie();

* obj.insert(word);

* boolean param_2 = obj.search(word);

* boolean param_3 = obj.startsWith(prefix);

*/