The input contains 4 blocks in 2 stacks. From left to right:
- Stack 1 has 1 level.Level 1 has a purple block.
- Stack 2 has 3 level. From bottom to top: level 1 has an yellow block, level 2 has an blue block, level 3 has an orange block,
As such, for the question "What is the color of the block at stack 2, level 1?", the correct answer is "<Output> yellow".
<Output> yellow