Practice of programming 3rd commit

.gradle/6.1.1/executionHistory/executionHistory.bin

.gradle/6.1.1/executionHistory/executionHistory.lock

.gradle/6.1.1/fileChanges/last-build.bin

.gradle/6.1.1/fileContent/fileContent.lock

.gradle/6.1.1/fileHashes/fileHashes.bin

.gradle/6.1.1/fileHashes/fileHashes.lock

.gradle/6.1.1/fileHashes/resourceHashesCache.bin

.gradle/6.1.1/gc.properties

.gradle/6.1.1/javaCompile/classAnalysis.bin

.gradle/6.1.1/javaCompile/jarAnalysis.bin

.gradle/6.1.1/javaCompile/javaCompile.lock

.gradle/6.1.1/javaCompile/taskHistory.bin

.gradle/buildOutputCleanup/buildOutputCleanup.lock

.gradle/buildOutputCleanup/cache.properties

.gradle/buildOutputCleanup/outputFiles.bin

.gradle/checksums/checksums.lock

.gradle/checksums/md5-checksums.bin

.gradle/checksums/sha1-checksums.bin

.gradle/vcs-1/gc.properties

.idea/.gitignore