[4.0K] .
├── [ 51K] lesson01.txt
├── [ 52K] lesson02.txt
├── [ 59K] lesson03.txt
├── [ 65K] lesson04.txt
├── [ 82K] lesson05.txt
├── [ 69K] lesson06.txt
├── [ 95K] lesson07.txt
├── [ 92K] lesson08.txt
├── [139K] lesson09.txt
├── [111K] lesson10.txt
├── [119K] lesson11.txt
├── [139K] lesson12.txt
├── [ 68K] lesson13.txt
├── [ 36K] lesson14.txt
├── [162K] lesson15.txt
├── [ 86K] lesson16.txt
├── [ 99K] lesson17.txt
├── [ 40K] lesson18.txt
├── [ 89K] lesson19.txt
├── [ 67K] lesson20.txt
├── [ 82K] lesson21.txt
├── [102K] lesson21-word.txt
├── [145K] lesson22.txt
├── [ 82K] lesson23.txt
├── [ 51K] lesson24.txt
└── [224K] lesson-references.txt
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