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

Ex Input:
Economic equilibrium occurs where the _ lines intersect.

Ex Output:
two

Ex Input:
Most volcanoes erupt for _ to four weeks and then rest.

Ex Output:
three

Ex Input:
Multidisciplinary planning is the interweaving of _ or three disciplines.

Ex Output:
two