Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Inhibited desire is the most common sexual dysfunction, effecting ____ in three couples.
one

Hoatzin has typical foot with ____ toes forwards and one backwards.
three

Cancer is among the ____ leading causes of death in all age groups, except very young children.

three