Sat Aug 1 11:33:38 2020 chain_letter_dendrogram: Python version: 3.6.9 Construct a dendrogram to analyze the relationship among a set of 11 versions of a chain letter. Chain letter distance matrix read from "chain_letter_data.txt" Graphics saved as "chain_letter_dendrogram.png" chain_letter_dendrogram: Normal end of execution. Sat Aug 1 11:33:39 2020