Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Yvonne and Janna were writing their 1000-word pair research paper. Yvonne was able to write 400 words while Janna wrote 150 more words than Yvonne. When they edited their paper, they removed 20 words and added twice as many words as they removed. How many more words should they add to reach the research paper requirement?

### Response:
 Janna aliandika maneno 400 + 150 = <<400+150=550>>550.
Waliandika jumla ya maneno 400 + 550 = <<400+550=950>>950.
Walikuwa na maneno 950 - 20 = <<950-20=930>>930 yaliyobaki baada ya kuondoa maneno 20.
Waliongeza maneno 2 x 20 = <<2*20=40>>40 wakati wa kuhariri.
Kwa jumla, wana maneno 930 + 40 = <<930+40=970>>970.
Hivyo, wanapaswa kuongeza maneno 1000 - 970 = <<1000-970=30>>30 zaidi.