Title case headline

Write codeMedium15 min

Your task

A publishing tool formats headlines in title case. Given a headline of words (letters only) separated by single spaces, capitalize each word, first letter uppercase, the rest lowercase, except that the small words 'a', 'an', 'the', 'and', 'or', 'of', 'in', 'on', 'to' stay entirely lowercase. A small word in the first or last position is still capitalized. For example, 'the state of the art' becomes 'The State of the Art'.

Examples

title_case(headline: str) -> str

Example 1

Inputtitle_case("the state of the art")

Output"The State of the Art"