3 Conflicting definitions for: `Just'
5 Imported from Prelude at ds025.hs:3
8 Conflicting definitions for: `Nothing'
10 Imported from Prelude at ds025.hs:3
13 Conflicting definitions for: `Maybe'
14 Defined at ds025.hs:18
15 Imported from Prelude at ds025.hs:3
18 Compilation had errors