Write a code to count the number of lines in a text that contain a
given word.
Input
Input is formed by a word
in the first line, followed by a text in subsequent input lines; these
lines are formed by space-separated words.
Output
The number of lines in the text that have
as one of their words.
About statements
The official statement of a problem is always the one
in the PDF document. The HTML version of the statement
is also given to help you, but may contain some content
that is not well displayed. In case of doubt, always use the PDF.