
<interactive>:9:12: error:
    Couldn't match expected type ‘Ghci1.Planet’
                with actual type ‘Planet’
    NB: ‘Planet’ is defined at <interactive>:7:1-41
        ‘Ghci1.Planet’ is defined at <interactive>:4:1-49
    In the second argument of ‘(==)’, namely ‘Mercury’
    In the expression: mercury == Mercury
    In an equation for ‘it’: it = mercury == Mercury

<interactive>:11:10: error:
    Couldn't match expected type ‘Planet’
                with actual type ‘Ghci1.Planet’
    NB: ‘Ghci1.Planet’ is defined at <interactive>:4:1-49
        ‘Planet’ is defined at <interactive>:7:1-41
    In the second argument of ‘(==)’, namely ‘Earth’
    In the expression: Venus == Earth
    In an equation for ‘it’: it = Venus == Earth