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040000 tree 9ed6d4be92315d295a4adb4a677b3163a8b1c251	bootutil
040000 tree 0557a0239ec7b379cfda8ac38263c6bdc6a1d8f6	mynewt
040000 tree b540c6227f6ef319bf0ca993279c4a6c5531b680	zephyr