import "Prelude"

dummySum [] = 0
dummySum [a] = a
dummySum [a,b] = a + b
dummySum [a,b,c] = a + b + c
dummySum l = sum l

main = dummySum [] + dummySum [1] + dummySum [1,2] + dummySum [1,2,3]
--
10