How to pass current data from Adapter to Adapter?

Heterogeneous RecyclerView

Hello friends I have a simple doubt

I wanted to pass my current data from my MainAdapter to VerticalAdapter.

Here, i am adding Text to the vertical list

 ` public void addItem1(String singleLineText) {
        VerticalModel verticalModel = new VerticalModel();

On this part comes the problem for passing the Text to my VerticalAdapter.I had passed the vertical list to the vertical adapter.But i need to pass the singleLineText what should i do??

` private void configureViewHolder1(VerticalViewHolder vh1){
    VerticalAdapter adapter1 = new VerticalAdapter(verticallist);
    vh1.recyclerView.setLayoutManager(new LinearLayoutManager(context));

Thank You