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

### Instruction:
Alina and her best friend Lucia like to chat a lot. On a particular day, Alina sent 20 fewer messages than her friend Lucia, who sent 120 messages. The next day, Lucia sent 1/3 of the messages she sent the previous day, while Alina doubled the messages she sent on the first day. If they sent the same number of messages on the third day as the first day, what is the total number of messages they sent in those three days?

### Response:
 Siku ya kwanza, Alina alituma ujumbe 120 - 20 = <<120-20=100>>100.
Jumla ya ujumbe siku ya kwanza ni 100+120 = <<100+120=220>>220.
Siku ya pili, Lucia alituma 1/3 *120 = <<1/3*120=40>>40 ujumbe.
Alina alituma 100*2 = <<100*2=200>>200 ujumbe siku ya pili.
Jumla ya ujumbe siku ya pili ni 40+200 = <<40+200=240>>240.
Kwa siku tatu, walituma ujumbe 220+220+240 = <<220+220+240=680>>680.