Make your argument based on your analysis of the given charts.
My answer is…
GDS Link
outputPrice = Producer Price Index by Commodity: Software Publishing
inputPrice = Producer Price Index by Commodity: Professional Services (Partial): Engineering Services
Comptus
outputPrice = Producer Price Index by Commodity: Machinery and Equipment: Miscellaneous Instruments
inputPrice = Producer Price Index by Commodity: Metals and Metal Products: Nonferrous Metals