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

### Instruction:
Janice can type 6 sentences per minute. Today at work, Janice continued working on a paper she started typing yesterday. She typed for 20 minutes, took a break, and typed 15 minutes longer. She then had to erase 40 sentences she had typed incorrectly. After a meeting, she typed for 18 minutes more. In all, the paper had 536 sentences by the end of today. How many sentences did she start with today?

### Response:
 Janice aliandika kwa jumla ya dakika 20 + 15 = <<20+15=35>>35.
Janice aliandika sentensi 6 x 35 = <<6*35=210>>210 kabla ya mapumziko yake.
Janice aliandika sentensi 6 x 18 = <<6*18=108>>108 baada ya mapumziko yake.
Janice aliandika jumla ya sentensi 210 + 108 = <<210+108=318>>318 leo.
Janice alilazimika kufuta sentensi 40, hivyo alikuwa na 318 - 40 = <<318-40=278>>278 sentensi ambazo aliandika.
Karatasi ilikuwa na sentensi 536 - 278 = <<536-278=258>>258 wakati alianza leo.