The tutorial provides fourteen practical lessons. Each practical lesson contains theoretical material, tasks, test questions and individual tasks. The theoretical material for better perception is presented in the form of a reference summary. Individual tasks are given in 10 versions. Each option contains 3-4 tasks that are solved in the same way as the disassembled tasks. Options 1-4 are for level 1-3 of learning material, options 5-8 - level 2-4, options 9-10 - for level 5.