What is the output of the following code snippet?
for i from 1 to 60: makeset(i)
for i from 1 to 30: union(i, 2*i)
for i from 1 to 20: union(i, 3*i)
for i from 1 to 12: union(i, 5*i)
for i from 1 to 60: find(i)