In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Input: Consider Input: Y are _ morphisms and g is quasi-compact and surjective.

Output: two


Input: Consider Input: College students are _ times more likely to become infected than healthy adults.

Output: five


Input: Consider Input: Many physicists believe that the neutrino, like a photon, has _ mass at all.


Output: no