fix 19
again 19
Revert "fix 19"

This reverts commit 912d724d4068ee6c0f38c0b96190b44356d5a219.
sorry, again 19
fix 20
fix 25 (spaces)
fix 25
Tasks 37 & 40.
New 19, 20, 21, 22
Tasks 16, 17, 18 & 21 again, but it's so strange.
New 36, 37
Vereshchagina, new 19-22
Merge branch 'master' of https://github.com/gsvgit/142_13_1