1    import kedr/u8
2                i32
3                u32
4                u64
5                f32
6                f64
7                usize
8                bool
9                Ptr
10               MutPtr
11               Ref
12               MutRef
13               Unit
14               Number
15               Real
16               Float
17               Signed
18               Char
19               CChar
20               String
21               CString
22               Slice
23               MutSlice
24               Option
25               HashState
26               Comparable
27               Compare
28               Ordering
29               println
30               Kd
31   import Option/Some
32                 None
33