test31 = putTree1 {_} {_} {@$\mathbb{N}$@} {@$\mathbb{N}$@} (createEmptyRedBlackTree@$\mathbb{N}$@ @$\mathbb{N}$@ ) 1 1
$ \t @$\rightarrow$@ putTree1 t 2 2
$ \t @$\rightarrow$@ putTree1 t 3 3
$ \t @$\rightarrow$@ putTree1 t 4 4
$ \t @$\rightarrow$@ getRedBlackTree t 4
$ \t x @$\rightarrow$@ x