040000 tree 1c5527d4f384a8e1524702105691bd6bfca7f64e	checkers
040000 tree c6af763101c4380ca05cd105ffaae44eca9f5e04	configuration
040000 tree 5a79ee03b364fefc4236b726378f6f92594df0b0	installation
040000 tree fb286de1522f9afb6740e5d804d6f761edadec12	messages
040000 tree a51042361195dbf08d64bd388bf32d03a43950ce	usage