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

### 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:
The number of blocks in the second stack is 7 blocks + 3 blocks = <<7+3=10>>10 blocks.
The number of blocks in the third stack is 10 blocks - 6 blocks = <<10-6=4>>4 blocks.
The number of blocks in the fourth stack is 4 blocks + 10 blocks = <<4+10=14>>14 blocks.
The fifth stack has 10 blocks x 2 = <<10*2=20>>20 blocks.
In total there are 7 blocks + 10 blocks + 4 blocks + 14 blocks + 20 blocks = <<7+10+4+14+20=55>>55 blocks.
#### 55