<prompt> Translate the following text to Swahili4 Household First-Class Mail either sent or received by households.  <response>: 4 a Barua ya darasa la kwanza ya nyumba, au barua ya darasa la kwanza, au barua ya darasa la kwanza ya nyumba, au barua ya darasa la kwanza ya nyumba, au barua ya darasa la kwanza ya nyumba. 