void DecodeHuffmanCode(MHnode* root,string code)
{
    int i=0;
    string res="";
    MHnode* runner=root;
    for(int i=0; i<code.length(); i++){
        runner=root;
         while(runner->left or runner->right){
            if(code[i]=='0'){
                runner=runner->left;
            }else{
                runner=runner->right;
            }
        }
        res+=runner->letter;

    }
    cout<<res<<endl;

}