Data.Tuple.Select
class Sel1 a b
class Sel2 a b
class Sel3 a b
class Sel4 a b
class Sel5 a b
class Sel6 a b
class Sel7 a b
class Sel8 a b
class Sel9 a b
class Sel10 a b
class Sel11 a b
class Sel12 a b
class Sel13 a b
class Sel14 a b
class Sel15 a b