class Solution{
  
  constructor(){
    this.stack = [];
    this.queue = [];
  }
  
  pushCharacter(char){
    //store original array here
    this.stack.push(char);
  }  
    
  enqueueCharacter(char){
    //store reverse array here
    this.queue.unshift(char);
  }
  
  popCharacter(){
    //return first character from stack
    return this.stack.pop();
  }
  
  dequeueCharacter(){
    //return first character from queue
    return this.queue.pop();
  }
  
}