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

### Instruction:
Mark plants some strawberries in his backyard. Every month, the number of strawberry plants doubles. After 3 months, Mark digs up 4 strawberry plants and gives them to his friend.  If he still has 20 strawberry plants, how many did he initially plant?

### Response:
 Idadi ya mimea ya matunda ya jamii ya matunda inazidishwa mara mbili kila mwezi.
Mark anapanda mimea ya matunda ya jamii ya matunda katika bustani yake. Kila mwezi, idadi ya mimea ya matunda ya jamii ya matunda inazidishwa mara mbili. Baada ya miezi 3, Mark anachimba mimea 4 ya matunda ya jamii ya matunda na kuwapa rafiki yake. Ikiwa bado ana mimea ya matunda ya jamii ya matunda 20, alipanda mimea mingapi awali?