(?) :: Int -> Int -> Int
-- testing 60 combinations of argument values
-- looking through 4/8 candidates of size 1
-- looking through 0/12 candidates of size 2
-- looking through 48/48 candidates of size 3
x ? y  =  x + y

(?) :: Int -> Int -> Int
-- testing 60 combinations of argument values
-- looking through 4/8 candidates of size 1
-- looking through 0/12 candidates of size 2
-- looking through 48/48 candidates of size 3
x ? y  =  x * y

i :: Int -> Int
-- testing 60 combinations of argument values
-- looking through 3/7 candidates of size 1
-- looking through 3/9 candidates of size 2
-- looking through 18/24 candidates of size 3
i x  =  x + 1

d :: Int -> Int
-- testing 60 combinations of argument values
-- looking through 3/7 candidates of size 1
-- looking through 3/9 candidates of size 2
-- looking through 18/24 candidates of size 3
cannot conjure