Write a program that reads a sequence of words and counts how many times the word "hello" appears
Input
The input is a sequence of words
Output
The output is the number of times the word "hello" occurs in the sequence.
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.