f1([1,2,3,4],2)
f2([1,2,3,4])
f3(sqr,[1,2,3,4])
f4([1,2,3,4])

g1([1,2,3,4],2)
g2([1,2,3,4])
g3(isprime,[1,2,3,4])
g4([1,2,3,4])

for(i=0,3,print(invmod(i,4)))
sub2(4)
