var find_pairing = function(node1, node2){
  var queue = []
  var curr_node = node1
  curr_node.visited = true
  curr_node.children.forEach(function(child){
    queue.push(child)
  })

  while(!queue.empty){
    while(curr_node.visited === true){
      curr_node = queue.pop
      if(!curr_node){
        return false
      }else if(curr_node === node2){
        return true
      }
    }

    curr_node.visited = true
    curr_node.children.forEach(function(child){
      queue.push(child)
    })

  }

}