Write the LogMessage method containsWord, which returns true if the description in the log message properly contains a given keyword and returns false otherwise.

A description properly contains a keyword if all three of the following conditions are true.

• the keyword is a substring of the description;
• the keyword is either at the beginning of the description or it is immediately preceded by a space;
• the keyword is either at the end of the description or it is immediately followed by a space.

The following tables show several examples. The descriptions in the left table properly contain the keyword “disk”. The descriptions in the right table do not properly contain the keyword “disk”.