Now the current block configuration is: - Stack with green block - Stack with yellow block, red block, blue block, purple block, from bottom to top The action "move(purple,green)" is valid. We execute this action. Now the current block configuration is: - Stack with green block, purple block, from bottom to top - Stack with yellow block, red block, blue block, from bottom to top The action "move(blue,table)" is valid. We execute this action. Now the current block configuration is: - Stack with green block, purple block, from bottom to top - Stack with yellow block, red block, from bottom to top - Stack with blue block The action "move(red,blue)" is valid. We execute this action. Yes