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

### Instruction:
Thomas made 4 stacks of wooden blocks. The first stack was 7 blocks tall. The second stack was 3 blocks taller than the first. The third stack was 6 blocks shorter than the second stack, and the fourth stack was 10 blocks taller than the third stack. If the fifth stack has twice as many blocks as the second stack, how many blocks did Thomas use in all?

### Response:
 Safu ya pili ina vitalu 7 + vitalu 3 = <<7+3=10>>10.
Safu ya tatu ina vitalu 10 - vitalu 6 = <<10-6=4>>4.
Safu ya nne ina vitalu 4 + vitalu 10 = <<4+10=14>>14.
Safu ya tano ina vitalu 10 x 2 = <<10*2=20>>20.
Jumla ya vitalu ni vitalu 7 + vitalu 10 + vitalu 4 + vitalu 14 + vitalu 20 = <<7+10+4+14+20=55>>55.